#91B4CB
Closest named color: Light Grey Blue (#9DBCD4). oklch(75.2% 0.05 237.1), rgb(145, 180, 203).
Aa
Black text reads best on this color (9.59:1).
About this color
#91B4CB is a medium-light, muted blue. In OKLCH its lightness is 75%, its chroma 0.050 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.029 away. Black text reads best on it, at 9.59:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.59:1 |
| White text | 2.18:1 |
Values
| HEX | #91B4CB |
| RGB | rgb(145, 180, 203) |
| HSL | hsl(204, 36%, 68%) |
| OKLCH | oklch(75.2% 0.05 237.1) |
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 #91B4CB | 2.18:1 | Fails | Lc -47.8 | Large or bold text, headings |
| Black text on #91B4CB | 9.59:1 | AAA | Lc 60.9 | Content text, not long reading |
| #91B4CB text on white | 2.18:1 | Fails | Lc 43.0 | Non-text elements, placeholder text |
| #91B4CB text on black | 9.59:1 | AAA | Lc -59.1 | 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
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D3
oklch(80.8% 0.032 237.7)
-
Step 400
400 (this color)
#91B4CB
oklch(75.2% 0.05 237.1)
-
Step 500
500
#6390AC
oklch(63.2% 0.065 236.5)
-
Step 600
600
#497A97
oklch(55.7% 0.07 235.9)
-
Step 700
700
#3A6681
oklch(49% 0.065 237.1)
-
Step 800
800
#315369
oklch(42.6% 0.054 238.2)
-
Step 900
900
#2B4555
oklch(37.6% 0.042 236.5)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#91B4CB 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) | #AAB3CC | 0.032 |
| Deuteranopia (no green cones) | #A2ACCB | 0.029 |
| Tritanopia (no blue cones) | #7FBABB | 0.039 |
| Achromatopsia (no color) | #AFAFAF | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B4CB
#91B4CB
oklch(75.2% 0.05 237.1)
- #C8A790
#C8A790
oklch(75.2% 0.05 56.7)
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 #91B4CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.029
- Light Cornflower Blue #98C1D9 ΔE 0.038
- French Gray #ADB5BD ΔE 0.040
- Cool Steel #97A7B3 ΔE 0.041
- Dark Gray #A9A9A9 ΔE 0.053
- Cloudy Blue #ACC2D9 ΔE 0.055
- Bluegrey #85A3B2 ΔE 0.055
- Cool Grey #95A3A6 ΔE 0.059
Use #91B4CB 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.