#91B1BF
Closest named color: Cool Steel (#97A7B3). oklch(74.1% 0.04 226.3), rgb(145, 177, 191).
Aa
Black text reads best on this color (9.24:1).
About this color
#91B1BF is a medium-light, muted teal or cyan. In OKLCH its lightness is 74%, its chroma 0.040 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.027 away. Black text reads best on it, at 9.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.24:1 |
| White text | 2.27:1 |
Values
| HEX | #91B1BF |
| RGB | rgb(145, 177, 191) |
| HSL | hsl(198, 26%, 66%) |
| OKLCH | oklch(74.1% 0.04 226.3) |
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 #91B1BF | 2.27:1 | Fails | Lc -49.6 | Large or bold text, headings |
| Black text on #91B1BF | 9.24:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #91B1BF text on white | 2.27:1 | Fails | Lc 44.8 | Non-text elements, placeholder text |
| #91B1BF text on black | 9.24:1 | AAA | Lc -57.3 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE0
oklch(88.5% 0.014 226.6)
-
Step 300
300
#B0C4CD
oklch(80.8% 0.025 226.6)
-
Step 400
400 (this color)
#91B1BF
oklch(74.1% 0.04 226.3)
-
Step 500
500
#6890A2
oklch(63% 0.052 227.6)
-
Step 600
600
#4E7A8D
oklch(55.5% 0.057 227.1)
-
Step 700
700
#3F6778
oklch(49.1% 0.053 226.9)
-
Step 800
800
#345461
oklch(42.7% 0.043 225.7)
-
Step 900
900
#2E454F
oklch(37.6% 0.033 226.9)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#91B1BF 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) | #A9AFC0 | 0.031 |
| Deuteranopia (no green cones) | #A2AABF | 0.028 |
| Tritanopia (no blue cones) | #83B5B5 | 0.027 |
| Achromatopsia (no color) | #ACACAC | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B1BF
#91B1BF
oklch(74.1% 0.04 226.3)
- #C2A496
#C2A496
oklch(74.2% 0.041 46.5)
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 #91B1BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.027
- French Gray #ADB5BD ΔE 0.039
- Dark Gray #A9A9A9 ΔE 0.041
- Light Grey Blue #9DBCD4 ΔE 0.041
- Pewter #96A8A1 ΔE 0.042
- Bluegrey #85A3B2 ΔE 0.043
- Cool Grey #95A3A6 ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.049
Use #91B1BF 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.