#91B0CB
Closest named color: Cool Steel (#97A7B3). oklch(74.3% 0.052 244.9), rgb(145, 176, 203).
Aa
Black text reads best on this color (9.27:1).
About this color
#91B0CB is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.052 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.036 away. Black text reads best on it, at 9.27:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.27:1 |
| White text | 2.26:1 |
Values
| HEX | #91B0CB |
| RGB | rgb(145, 176, 203) |
| HSL | hsl(208, 36%, 68%) |
| OKLCH | oklch(74.3% 0.052 244.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #91B0CB | 2.26:1 | Fails | Lc -49.4 | Large or bold text, headings |
| Black text on #91B0CB | 9.27:1 | AAA | Lc 59.4 | Large or bold text, headings |
| #91B0CB text on white | 2.26:1 | Fails | Lc 44.6 | Non-text elements, placeholder text |
| #91B0CB text on black | 9.27:1 | AAA | Lc -57.5 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D5
oklch(80.8% 0.033 246.8)
-
Step 400
400 (this color)
#91B0CB
oklch(74.3% 0.052 244.9)
-
Step 500
500
#678EAF
oklch(63.1% 0.066 244.6)
-
Step 600
600
#4E789B
oklch(55.6% 0.072 244.7)
-
Step 700
700
#3F6584
oklch(49.2% 0.066 244.3)
-
Step 800
800
#34526C
oklch(42.7% 0.056 245.8)
-
Step 900
900
#2E4457
oklch(37.7% 0.043 245.3)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#91B0CB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #A5B0CC | 0.026 |
| Deuteranopia (no green cones) | #9EAACB | 0.022 |
| Tritanopia (no blue cones) | #80B6B9 | 0.041 |
| Achromatopsia (no color) | #ACACAC | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B0CB
#91B0CB
oklch(74.3% 0.052 244.9)
- #C3A68A
#C3A68A
oklch(74.4% 0.052 65.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #91B0CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.036
- Light Grey Blue #9DBCD4 ΔE 0.037
- French Gray #ADB5BD ΔE 0.045
- Light Cornflower Blue #98C1D9 ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.049
- Dark Gray #A9A9A9 ΔE 0.053
- Bluey Grey #89A0B0 ΔE 0.053
- Cool Grey #95A3A6 ΔE 0.055
Use #91B0CB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.