#55818E
Closest named color: Grey Blue (#647D8E). oklch(57.6% 0.052 218.4), rgb(85, 129, 142).
Aa
Black text reads best on this color (4.91:1).
About this color
#55818E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 58%, its chroma 0.052 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.020 away. Black text reads best on it, at 4.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #55818E |
| RGB | rgb(85, 129, 142) |
| HSL | hsl(194, 25%, 45%) |
| OKLCH | oklch(57.6% 0.052 218.4) |
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 #55818E | 4.27:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #55818E | 4.91:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #55818E text on white | 4.27:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #55818E text on black | 4.91:1 | AA | Lc -32.2 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B1C5CB
oklch(81% 0.023 217.7)
-
Step 400
400
#87A7B0
oklch(70.7% 0.038 216.7)
-
Step 500
500
#68919D
oklch(63.1% 0.048 217.9)
-
Step 600
600 (this color)
#55818E
oklch(57.6% 0.052 218.4)
-
Step 700
700
#406873
oklch(49.2% 0.048 217.1)
-
Step 800
800
#35555E
oklch(42.8% 0.04 217.5)
-
Step 900
900
#2E464D
oklch(37.7% 0.032 218)
-
Step 950
950
#1B292D
oklch(27% 0.02 217.4)
#55818E 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) | #787E8F | 0.045 |
| Deuteranopia (no green cones) | #70778E | 0.043 |
| Tritanopia (no blue cones) | #3E8685 | 0.032 |
| Achromatopsia (no color) | #7A7A7A | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55818E
#55818E
oklch(57.6% 0.052 218.4)
- #956F63
#956F63
oklch(57.6% 0.052 38.2)
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 #55818E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.020
- Battleship Grey #6B7C85 ΔE 0.029
- Steel Grey #6F828A ΔE 0.033
- Stormy Blue #507B9C ΔE 0.033
- Slate Gray #708090 ΔE 0.034
- Cerulean #457B9D ΔE 0.038
- Steel #738595 ΔE 0.042
- Battleship Gray #6C757D ΔE 0.042
Use #55818E 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.