#91B5CF
Closest named color: Light Grey Blue (#9DBCD4). oklch(75.6% 0.054 239.8), rgb(145, 181, 207).
Aa
Black text reads best on this color (9.71:1).
About this color
#91B5CF is a medium-light, muted blue. In OKLCH its lightness is 76%, its chroma 0.054 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.025 away. Black text reads best on it, at 9.71:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.71:1 |
| White text | 2.16:1 |
Values
| HEX | #91B5CF |
| RGB | rgb(145, 181, 207) |
| HSL | hsl(205, 39%, 69%) |
| OKLCH | oklch(75.6% 0.054 239.8) |
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 #91B5CF | 2.16:1 | Fails | Lc -47.2 | Large or bold text, headings |
| Black text on #91B5CF | 9.71:1 | AAA | Lc 61.5 | Content text, not long reading |
| #91B5CF text on white | 2.16:1 | Fails | Lc 42.5 | Non-text elements, placeholder text |
| #91B5CF text on black | 9.71:1 | AAA | Lc -59.7 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#AEC4D5
oklch(80.9% 0.034 241.2)
-
Step 400
400 (this color)
#91B5CF
oklch(75.6% 0.054 239.8)
-
Step 500
500
#628FAF
oklch(63% 0.069 240.2)
-
Step 600
600
#48799B
oklch(55.6% 0.075 240.3)
-
Step 700
700
#396684
oklch(49.1% 0.069 239.5)
-
Step 800
800
#30536C
oklch(42.7% 0.058 241)
-
Step 900
900
#2A4557
oklch(37.7% 0.045 238.8)
-
Step 950
950
#192833
oklch(26.9% 0.029 241)
#91B5CF 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) | #AAB4D0 | 0.032 |
| Deuteranopia (no green cones) | #A2ADCF | 0.029 |
| Tritanopia (no blue cones) | #7EBCBD | 0.044 |
| Achromatopsia (no color) | #B0B0B0 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B5CF
#91B5CF
oklch(75.6% 0.054 239.8)
- #CAA88E
#CAA88E
oklch(75.5% 0.054 59.2)
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 #91B5CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.025
- Light Cornflower Blue #98C1D9 ΔE 0.034
- French Gray #ADB5BD ΔE 0.042
- Cool Steel #97A7B3 ΔE 0.046
- Cloudy Blue #ACC2D9 ΔE 0.052
- Dark Gray #A9A9A9 ΔE 0.058
- Bluegrey #85A3B2 ΔE 0.060
- Light Steel Blue #B0C4DE ΔE 0.060
Use #91B5CF 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.