China Colour Intelligence
Blue#177CB0
靛青（diàn qīng）
Indigo
Colour Values色值
HEX
#177CB0
RGB
rgb(23, 124, 176)
HSL
hsl(200, 77%, 39%)
OKLCH
oklch(0.558 0.117 238.3)
CMYK
87, 30, 0, 31
approx
Global Colour Equivalents国际色卡对照
CSS nearest ≈
steelblue
#4682B4
Pantone FHI/TCX ≈
swedish-blue
#007EB1
Nearest perceptual match (OKLab). Pantone value is from an unofficial dataset — approximate; verify against official swatches before production.
Imagery & Provenance意象与出处
Imagery
Indigo
Origin
Indigo dye
System
A Classical names
Source
Indigo dye; Xunzi — “blue is taken from the indigo plant”.
Evidence
Ancient-text attestation (attestation > artifact > compilation > approximation)
Imagery意象图
Brand & Product References国际色号案例
China Mobile Blue
#0085D0 · ≈ Δ0.051 (OKLab)
China Mobile
photo: 茅野ふたば · CC BY-SA 4.0
BMW Blue
#0066B1 · ≈ Δ0.066 (OKLab)
BMW
photo: Diego Delso · CC BY-SA 3.0
Amex Blue
#006FCF · ≈ Δ0.066 (OKLab)
American Express
photo: Beyond My Ken · CC BY-SA 4.0
Editorial reference only — same/near shade used by these brands. Names and colours are trademarks of their respective owners; photos are CC-licensed from Wikimedia Commons (see credit on each card); no affiliation or endorsement implied.
Cultural Note for non-Chinese Designers文化提示
CautionIndigo plant dye.
Same Family同色系
Pantone/CSS values are nearest perceptual matches (OKLab distance), not official colour codes.