#5B878E
Closest named color: Steel Grey (#6F828A). oklch(59.4% 0.049 208.4), rgb(91, 135, 142).
Aa
Black text reads best on this color (5.30:1).
About this color
#5B878E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.049 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.026 away. Black text reads best on it, at 5.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.30:1 |
| White text | 3.96:1 |
Values
| HEX | #5B878E |
| RGB | rgb(91, 135, 142) |
| HSL | hsl(188, 22%, 46%) |
| OKLCH | oklch(59.4% 0.049 208.4) |
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 #5B878E | 3.96:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #5B878E | 5.30:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #5B878E text on white | 3.96:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #5B878E text on black | 5.30:1 | AA | Lc -34.7 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDE
oklch(88.6% 0.013 208.8)
-
Step 300
300
#B0C5C9
oklch(80.9% 0.024 210.4)
-
Step 400
400
#85A8AD
oklch(70.7% 0.039 207)
-
Step 500
500 (this color)
#5B878E
oklch(59.4% 0.049 208.4)
-
Step 600
600
#4C7C84
oklch(55.5% 0.053 209.1)
-
Step 700
700
#3D6970
oklch(49.2% 0.05 208.6)
-
Step 800
800
#33555B
oklch(42.6% 0.041 209.9)
-
Step 900
900
#2D474B
oklch(37.9% 0.032 208)
-
Step 950
950
#1B292C
oklch(27% 0.02 212.4)
#5B878E 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) | #80848E | 0.048 |
| Deuteranopia (no green cones) | #777D8E | 0.044 |
| Tritanopia (no blue cones) | #488B89 | 0.025 |
| Achromatopsia (no color) | #808080 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B878E
#5B878E
oklch(59.4% 0.049 208.4)
- #9A746E
#9A746E
oklch(59.5% 0.049 28.8)
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 #5B878E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.026
- Grey Blue #647D8E ΔE 0.030
- Slate Gray #708090 ΔE 0.032
- Steel #738595 ΔE 0.033
- Battleship Grey #6B7C85 ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.037
- Light Slate Gray #778899 ΔE 0.041
- Medium Grey #7D7F7C ΔE 0.048
Use #5B878E 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.