#5B8991
Closest named color: Steel Grey (#6F828A). oklch(60% 0.051 209.6), rgb(91, 137, 145).
Aa
Black text reads best on this color (5.43:1).
About this color
#5B8991 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 60%, its chroma 0.051 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.028 away. Black text reads best on it, at 5.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.43:1 |
| White text | 3.86:1 |
Values
| HEX | #5B8991 |
| RGB | rgb(91, 137, 145) |
| HSL | hsl(189, 23%, 46%) |
| OKLCH | oklch(60% 0.051 209.6) |
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 #5B8991 | 3.86:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #5B8991 | 5.43:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #5B8991 text on white | 3.86:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #5B8991 text on black | 5.43:1 | AA | Lc -35.6 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AFC5C9
oklch(80.8% 0.025 209.8)
-
Step 400
400
#84A8AE
oklch(70.7% 0.04 208.8)
-
Step 500
500 (this color)
#5B8991
oklch(60% 0.051 209.6)
-
Step 600
600
#4A7D85
oklch(55.7% 0.056 208.4)
-
Step 700
700
#3B6971
oklch(49.1% 0.052 209.9)
-
Step 800
800
#31565C
oklch(42.8% 0.043 208.9)
-
Step 900
900
#2C474B
oklch(37.8% 0.033 207.6)
-
Step 950
950
#1A292C
oklch(26.9% 0.021 211.4)
#5B8991 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) | #818692 | 0.049 |
| Deuteranopia (no green cones) | #787F91 | 0.044 |
| Tritanopia (no blue cones) | #468D8B | 0.027 |
| Achromatopsia (no color) | #828282 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8991
#5B8991
oklch(60% 0.051 209.6)
- #9D756E
#9D756E
oklch(60% 0.052 29.9)
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 #5B8991, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.028
- Steel #738595 ΔE 0.032
- Slate Gray #708090 ΔE 0.034
- Grey Blue #647D8E ΔE 0.035
- Dusty Teal #4C9085 ΔE 0.036
- Light Slate Gray #778899 ΔE 0.038
- Battleship Grey #6B7C85 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.045
Use #5B8991 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.