#91B9CF
Closest named color: Light Grey Blue (#9DBCD4). oklch(76.4% 0.053 232.4), rgb(145, 185, 207).
Aa
Black text reads best on this color (10.04:1).
About this color
#91B9CF is a medium-light, muted blue. In OKLCH its lightness is 76%, its chroma 0.053 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.019 away. Black text reads best on it, at 10.04:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 10.04:1 |
| White text | 2.09:1 |
Values
| HEX | #91B9CF |
| RGB | rgb(145, 185, 207) |
| HSL | hsl(201, 39%, 69%) |
| OKLCH | oklch(76.4% 0.053 232.4) |
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 #91B9CF | 2.09:1 | Fails | Lc -45.5 | Large or bold text, headings |
| Black text on #91B9CF | 10.04:1 | AAA | Lc 63.1 | Content text, not long reading |
| #91B9CF text on white | 2.09:1 | Fails | Lc 40.9 | Non-text elements, placeholder text |
| #91B9CF text on black | 10.04:1 | AAA | Lc -61.4 | Content text, not long reading |
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 300.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300 (this color)
#91B9CF
oklch(76.4% 0.053 232.4)
-
Step 400
400
#67AACD
oklch(70.7% 0.085 232.5)
-
Step 500
500
#3594C0
oklch(63% 0.109 232.5)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#0D4861
oklch(37.8% 0.071 232.1)
-
Step 950
950
#0B2A39
oklch(27% 0.045 233.1)
#91B9CF 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) | #AEB7D0 | 0.037 |
| Deuteranopia (no green cones) | #A6B0CF | 0.034 |
| Tritanopia (no blue cones) | #7DBFC0 | 0.039 |
| Achromatopsia (no color) | #B3B3B3 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B9CF
#91B9CF
oklch(76.4% 0.053 232.4)
- #CFAA94
#CFAA94
oklch(76.5% 0.053 52.4)
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 #91B9CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.019
- Light Cornflower Blue #98C1D9 ΔE 0.025
- French Gray #ADB5BD ΔE 0.040
- Cloudy Blue #ACC2D9 ΔE 0.045
- Cool Steel #97A7B3 ΔE 0.053
- Light Steel Blue #B0C4DE ΔE 0.054
- Sky Blue #87CEEB ΔE 0.059
- Lightblue #7BC8F6 ΔE 0.059
Use #91B9CF 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.