#91B1CF
Closest named color: Light Grey Blue (#9DBCD4). oklch(74.7% 0.056 246.9), rgb(145, 177, 207).
Aa
Black text reads best on this color (9.39:1).
About this color
#91B1CF is a medium-light, muted blue. In OKLCH its lightness is 75%, its chroma 0.056 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.034 away. Black text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.39:1 |
| White text | 2.23:1 |
Values
| HEX | #91B1CF |
| RGB | rgb(145, 177, 207) |
| HSL | hsl(209, 39%, 69%) |
| OKLCH | oklch(74.7% 0.056 246.9) |
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 #91B1CF | 2.23:1 | Fails | Lc -48.8 | Large or bold text, headings |
| Black text on #91B1CF | 9.39:1 | AAA | Lc 59.9 | Large or bold text, headings |
| #91B1CF text on white | 2.23:1 | Fails | Lc 44.0 | Non-text elements, placeholder text |
| #91B1CF text on black | 9.39:1 | AAA | Lc -58.1 | 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
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AFC3D6
oklch(80.8% 0.035 246.9)
-
Step 400
400 (this color)
#91B1CF
oklch(74.7% 0.056 246.9)
-
Step 500
500
#668EB3
oklch(63.2% 0.071 247.1)
-
Step 600
600
#4C789E
oklch(55.7% 0.077 245.8)
-
Step 700
700
#3D6488
oklch(49% 0.073 247.6)
-
Step 800
800
#33526E
oklch(42.7% 0.06 246.9)
-
Step 900
900
#2D4459
oklch(37.7% 0.046 246.9)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#91B1CF 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) | #A5B1D0 | 0.026 |
| Deuteranopia (no green cones) | #9EAACE | 0.023 |
| Tritanopia (no blue cones) | #7EB8BB | 0.046 |
| Achromatopsia (no color) | #ADADAD | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B1CF
#91B1CF
oklch(74.7% 0.056 246.9)
- #C6A788
#C6A788
oklch(74.8% 0.056 66.8)
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 #91B1CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.034
- Cool Steel #97A7B3 ΔE 0.041
- Light Cornflower Blue #98C1D9 ΔE 0.044
- French Gray #ADB5BD ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.054
- Dark Gray #A9A9A9 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.058
- Cloudy Blue #ACC2D9 ΔE 0.060
Use #91B1CF 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.