#91B4CF
Closest named color: Light Grey Blue (#9DBCD4). oklch(75.3% 0.054 241.6), rgb(145, 180, 207).
Aa
Black text reads best on this color (9.63:1).
About this color
#91B4CF is a medium-light, muted blue. In OKLCH its lightness is 75%, its chroma 0.054 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.028 away. Black text reads best on it, at 9.63:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.63:1 |
| White text | 2.17:1 |
Values
| HEX | #91B4CF |
| RGB | rgb(145, 180, 207) |
| HSL | hsl(206, 39%, 69%) |
| OKLCH | oklch(75.3% 0.054 241.6) |
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 #91B4CF | 2.17:1 | Fails | Lc -47.6 | Large or bold text, headings |
| Black text on #91B4CF | 9.63:1 | AAA | Lc 61.1 | Content text, not long reading |
| #91B4CF text on white | 2.17:1 | Fails | Lc 42.9 | Non-text elements, placeholder text |
| #91B4CF text on black | 9.63:1 | AAA | Lc -59.3 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE5
oklch(88.5% 0.019 243)
-
Step 300
300
#AEC4D5
oklch(80.9% 0.034 241.2)
-
Step 400
400 (this color)
#91B4CF
oklch(75.3% 0.054 241.6)
-
Step 500
500
#638FB0
oklch(63.1% 0.069 241.6)
-
Step 600
600
#49799C
oklch(55.7% 0.076 241.6)
-
Step 700
700
#3A6685
oklch(49.2% 0.07 240.9)
-
Step 800
800
#30536C
oklch(42.7% 0.058 241)
-
Step 900
900
#2B4558
oklch(37.8% 0.046 241.2)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#91B4CF 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) | #A9B3D0 | 0.031 |
| Deuteranopia (no green cones) | #A1ADCF | 0.026 |
| Tritanopia (no blue cones) | #7EBBBD | 0.044 |
| Achromatopsia (no color) | #B0B0B0 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B4CF
#91B4CF
oklch(75.3% 0.054 241.6)
- #C9A88C
#C9A88C
oklch(75.4% 0.055 62.2)
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 #91B4CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.028
- Light Cornflower Blue #98C1D9 ΔE 0.037
- French Gray #ADB5BD ΔE 0.043
- Cool Steel #97A7B3 ΔE 0.045
- Cloudy Blue #ACC2D9 ΔE 0.054
- Dark Gray #A9A9A9 ΔE 0.058
- Bluegrey #85A3B2 ΔE 0.058
- Light Steel Blue #B0C4DE ΔE 0.062
Use #91B4CF 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.