#91A8CF
Closest named color: Cool Steel (#97A7B3). oklch(72.8% 0.063 260.9), rgb(145, 168, 207).
Aa
Black text reads best on this color (8.70:1).
About this color
#91A8CF is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.063 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.041 away. Black text reads best on it, at 8.70:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.70:1 |
| White text | 2.41:1 |
Values
| HEX | #91A8CF |
| RGB | rgb(145, 168, 207) |
| HSL | hsl(218, 39%, 69%) |
| OKLCH | oklch(72.8% 0.063 260.9) |
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 #91A8CF | 2.41:1 | Fails | Lc -52.5 | Large or bold text, headings |
| Black text on #91A8CF | 8.70:1 | AAA | Lc 56.5 | Large or bold text, headings |
| #91A8CF text on white | 2.41:1 | Fails | Lc 47.5 | Large or bold text, headings |
| #91A8CF text on black | 8.70:1 | AAA | Lc -54.5 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C1DB
oklch(80.9% 0.04 262.9)
-
Step 400
400 (this color)
#91A8CF
oklch(72.8% 0.063 260.9)
-
Step 500
500
#6E8ABA
oklch(63.1% 0.08 260.9)
-
Step 600
600
#5673A6
oklch(55.5% 0.087 261.3)
-
Step 700
700
#46618F
oklch(49.2% 0.081 260.7)
-
Step 800
800
#3A4F74
oklch(42.7% 0.067 261.3)
-
Step 900
900
#32425D
oklch(37.8% 0.051 260.6)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#91A8CF 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) | #9BAAD1 | 0.015 |
| Deuteranopia (no green cones) | #95A4CE | 0.011 |
| Tritanopia (no blue cones) | #7FB0B5 | 0.056 |
| Achromatopsia (no color) | #A7A7A7 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91A8CF
#91A8CF
oklch(72.8% 0.063 260.9)
- #BBA37A
#BBA37A
oklch(72.6% 0.062 80.8)
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 #91A8CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.041
- Bluegrey #85A3B2 ΔE 0.046
- Bluey Grey #89A0B0 ΔE 0.048
- Greyblue #77A1B5 ΔE 0.054
- Cool Gray #8D99AE ΔE 0.055
- Light Grey Blue #9DBCD4 ΔE 0.057
- Cool Grey #95A3A6 ΔE 0.058
- Dark Gray #A9A9A9 ΔE 0.063
Use #91A8CF 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.