#91B4CC
Closest named color: Light Grey Blue (#9DBCD4). oklch(75.2% 0.051 238.3), rgb(145, 180, 204).
Aa
Black text reads best on this color (9.60:1).
About this color
#91B4CC is a medium-light, muted blue. In OKLCH its lightness is 75%, its chroma 0.051 and its hue 238°. 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 9.60:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.60:1 |
| White text | 2.18:1 |
Values
| HEX | #91B4CC |
| RGB | rgb(145, 180, 204) |
| HSL | hsl(204, 37%, 68%) |
| OKLCH | oklch(75.2% 0.051 238.3) |
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 #91B4CC | 2.18:1 | Fails | Lc -47.7 | Large or bold text, headings |
| Black text on #91B4CC | 9.60:1 | AAA | Lc 61.0 | Content text, not long reading |
| #91B4CC text on white | 2.18:1 | Fails | Lc 43.0 | Non-text elements, placeholder text |
| #91B4CC text on black | 9.60:1 | AAA | Lc -59.2 | 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
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D3
oklch(80.8% 0.032 237.7)
-
Step 400
400 (this color)
#91B4CC
oklch(75.2% 0.051 238.3)
-
Step 500
500
#6390AD
oklch(63.2% 0.066 237.5)
-
Step 600
600
#497999
oklch(55.5% 0.072 239.1)
-
Step 700
700
#3A6682
oklch(49.1% 0.066 238.1)
-
Step 800
800
#31536A
oklch(42.6% 0.055 239.5)
-
Step 900
900
#2B4556
oklch(37.7% 0.043 238.1)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#91B4CC 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) | #AAB3CD | 0.032 |
| Deuteranopia (no green cones) | #A2ACCC | 0.029 |
| Tritanopia (no blue cones) | #7FBABC | 0.039 |
| Achromatopsia (no color) | #AFAFAF | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B4CC
#91B4CC
oklch(75.2% 0.051 238.3)
- #C8A78F
#C8A78F
oklch(75.2% 0.051 57.9)
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 #91B4CC, 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 0.038
- French Gray #ADB5BD ΔE 0.041
- Cool Steel #97A7B3 ΔE 0.042
- Dark Gray #A9A9A9 ΔE 0.054
- Cloudy Blue #ACC2D9 ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.056
- Cool Grey #95A3A6 ΔE 0.060
Use #91B4CC 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.