#91B0CF
Closest named color: Light Grey Blue (#9DBCD4). oklch(74.5% 0.056 248.6), rgb(145, 176, 207).
Aa
Black text reads best on this color (9.31:1).
About this color
#91B0CF is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.056 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.037 away. Black text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.31:1 |
| White text | 2.25:1 |
Values
| HEX | #91B0CF |
| RGB | rgb(145, 176, 207) |
| HSL | hsl(210, 39%, 69%) |
| OKLCH | oklch(74.5% 0.056 248.6) |
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 #91B0CF | 2.25:1 | Fails | Lc -49.2 | Large or bold text, headings |
| Black text on #91B0CF | 9.31:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #91B0CF text on white | 2.25:1 | Fails | Lc 44.4 | Non-text elements, placeholder text |
| #91B0CF text on black | 9.31:1 | AAA | Lc -57.7 | 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
#D0DBE6
oklch(88.6% 0.019 248)
-
Step 300
300
#B0C3D7
oklch(80.9% 0.035 249.6)
-
Step 400
400 (this color)
#91B0CF
oklch(74.5% 0.056 248.6)
-
Step 500
500
#678DB4
oklch(63% 0.073 249.7)
-
Step 600
600
#4D779F
oklch(55.5% 0.078 248.2)
-
Step 700
700
#3E6488
oklch(49.1% 0.073 248.2)
-
Step 800
800
#34526F
oklch(42.8% 0.06 248.6)
-
Step 900
900
#2D445A
oklch(37.8% 0.048 248.1)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#91B0CF 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) | #A4B0D1 | 0.025 |
| Deuteranopia (no green cones) | #9DAACE | 0.021 |
| Tritanopia (no blue cones) | #7FB7BA | 0.047 |
| Achromatopsia (no color) | #ADADAD | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B0CF
#91B0CF
oklch(74.5% 0.056 248.6)
- #C4A686
#C4A686
oklch(74.4% 0.056 68.6)
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 #91B0CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.037
- Cool Steel #97A7B3 ΔE 0.041
- Light Cornflower Blue #98C1D9 ΔE 0.047
- French Gray #ADB5BD ΔE 0.048
- Bluegrey #85A3B2 ΔE 0.052
- Bluey Grey #89A0B0 ΔE 0.056
- Dark Gray #A9A9A9 ΔE 0.057
- Cool Grey #95A3A6 ΔE 0.059
Use #91B0CF 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.