#91B3B8
Closest named color: Cool Steel (#97A7B3). oklch(74.3% 0.038 207.4), rgb(145, 179, 184).
Aa
Black text reads best on this color (9.34:1).
About this color
#91B3B8 is a medium-light, muted teal or cyan. In OKLCH its lightness is 74%, its chroma 0.038 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.032 away. Black text reads best on it, at 9.34:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.34:1 |
| White text | 2.24:1 |
Values
| HEX | #91B3B8 |
| RGB | rgb(145, 179, 184) |
| HSL | hsl(188, 22%, 65%) |
| OKLCH | oklch(74.3% 0.038 207.4) |
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 #91B3B8 | 2.24:1 | Fails | Lc -49.1 | Large or bold text, headings |
| Black text on #91B3B8 | 9.34:1 | AAA | Lc 59.7 | Large or bold text, headings |
| #91B3B8 text on white | 2.24:1 | Fails | Lc 44.3 | Non-text elements, placeholder text |
| #91B3B8 text on black | 9.34:1 | AAA | Lc -57.8 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B0C5C8
oklch(80.8% 0.023 207.1)
-
Step 400
400 (this color)
#91B3B8
oklch(74.3% 0.038 207.4)
-
Step 500
500
#679298
oklch(63.1% 0.048 206.9)
-
Step 600
600
#4D7C83
oklch(55.5% 0.052 207.7)
-
Step 700
700
#3E696F
oklch(49.2% 0.049 207)
-
Step 800
800
#33555A
oklch(42.6% 0.04 207.6)
-
Step 900
900
#2D464A
oklch(37.6% 0.031 208.5)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#91B3B8 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) | #ADB0B8 | 0.036 |
| Deuteranopia (no green cones) | #A6ABB8 | 0.033 |
| Tritanopia (no blue cones) | #85B6B4 | 0.018 |
| Achromatopsia (no color) | #ADADAD | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B3B8
#91B3B8
oklch(74.3% 0.038 207.4)
- #C3A39F
#C3A39F
oklch(74.3% 0.038 26.4)
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 #91B3B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.032
- Pewter #96A8A1 ΔE 0.037
- French Gray #ADB5BD ΔE 0.038
- Dark Gray #A9A9A9 ΔE 0.039
- Cool Grey #95A3A6 ΔE 0.043
- Light Grey Blue #9DBCD4 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.048
- Muted Teal #90B494 ΔE 0.053
Use #91B3B8 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.