#55878E
Closest named color: Steel Grey (#6F828A). oklch(59.1% 0.055 207), rgb(85, 135, 142).
Aa
Black text reads best on this color (5.24:1).
About this color
#55878E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.055 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.032 away. Black text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #55878E |
| RGB | rgb(85, 135, 142) |
| HSL | hsl(187, 25%, 45%) |
| OKLCH | oklch(59.1% 0.055 207) |
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 #55878E | 4.00:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #55878E | 5.24:1 | AA | Lc 36.8 | Non-text elements, placeholder text |
| #55878E text on white | 4.00:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #55878E text on black | 5.24:1 | AA | Lc -34.4 | 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 600.
-
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
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AFC5C9
oklch(80.8% 0.025 209.8)
-
Step 400
400
#84A8AD
oklch(70.7% 0.04 206.8)
-
Step 500
500
#659299
oklch(63% 0.05 208.1)
-
Step 600
600 (this color)
#55878E
oklch(59.1% 0.055 207)
-
Step 700
700
#3C696F
oklch(49.1% 0.05 206.6)
-
Step 800
800
#32565B
oklch(42.8% 0.042 207)
-
Step 900
900
#2C474A
oklch(37.8% 0.033 204.7)
-
Step 950
950
#1A292C
oklch(26.9% 0.021 211.4)
#55878E 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) | #7F838E | 0.053 |
| Deuteranopia (no green cones) | #767C8E | 0.049 |
| Tritanopia (no blue cones) | #3D8B89 | 0.027 |
| Achromatopsia (no color) | #7F7F7F | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55878E
#55878E
oklch(59.1% 0.055 207)
- #9C716C
#9C716C
oklch(59.1% 0.055 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 #55878E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.032
- Grey Blue #647D8E ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.035
- Battleship Grey #6B7C85 ΔE 0.037
- Slate Gray #708090 ΔE 0.038
- Steel #738595 ΔE 0.039
- Light Slate Gray #778899 ΔE 0.047
- Stormy Blue #507B9C ΔE 0.048
Use #55878E 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.