#91A8BB
Closest named color: Cool Steel (#97A7B3). oklch(72% 0.038 243.2), rgb(145, 168, 187).
Aa
Black text reads best on this color (8.52:1).
About this color
#91A8BB is a medium-light, muted blue. In OKLCH its lightness is 72%, its chroma 0.038 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.013 away. Black text reads best on it, at 8.52:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.52:1 |
| White text | 2.46:1 |
Values
| HEX | #91A8BB |
| RGB | rgb(145, 168, 187) |
| HSL | hsl(207, 24%, 65%) |
| OKLCH | oklch(72% 0.038 243.2) |
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 #91A8BB | 2.46:1 | Fails | Lc -53.5 | Large or bold text, headings |
| Black text on #91A8BB | 8.52:1 | AAA | Lc 55.6 | Large or bold text, headings |
| #91A8BB text on white | 2.46:1 | Fails | Lc 48.4 | Large or bold text, headings |
| #91A8BB text on black | 8.52:1 | AAA | Lc -53.5 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE1
oklch(88.4% 0.013 244.3)
-
Step 300
300
#B4C3CF
oklch(80.9% 0.024 242)
-
Step 400
400 (this color)
#91A8BB
oklch(72% 0.038 243.2)
-
Step 500
500
#718DA5
oklch(63.1% 0.048 244.5)
-
Step 600
600
#587790
oklch(55.5% 0.053 243.2)
-
Step 700
700
#48647B
oklch(49% 0.05 243.8)
-
Step 800
800
#3C5264
oklch(42.8% 0.04 243.6)
-
Step 900
900
#334451
oklch(37.7% 0.031 241.6)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#91A8BB 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) | #A0A8BC | 0.020 |
| Deuteranopia (no green cones) | #9BA3BB | 0.018 |
| Tritanopia (no blue cones) | #86ADAE | 0.031 |
| Achromatopsia (no color) | #A5A5A5 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91A8BB
#91A8BB
oklch(72% 0.038 243.2)
- #B6A08D
#B6A08D
oklch(72% 0.037 63)
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 #91A8BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.013
- Bluegrey #85A3B2 ΔE 0.024
- Bluey Grey #89A0B0 ΔE 0.027
- Cool Grey #95A3A6 ΔE 0.029
- Pewter #96A8A1 ΔE 0.038
- Greyblue #77A1B5 ΔE 0.040
- Dark Gray #A9A9A9 ΔE 0.040
- Cool Gray #8D99AE ΔE 0.042
Use #91A8BB 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.