#255355
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.1% 0.05 199.2), rgb(37, 83, 85).
Aa
White text reads best on this color (8.58:1).
About this color
#255355 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.050 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.015 away. White text reads best on it, at 8.58:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.44:1 |
| White text | 8.58:1 |
Values
| HEX | #255355 |
| RGB | rgb(37, 83, 85) |
| HSL | hsl(183, 39%, 24%) |
| OKLCH | oklch(41.1% 0.05 199.2) |
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 #255355 | 8.58:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #255355 | 2.44:1 | Fails | Lc 14.6 | Not readable |
| #255355 text on white | 8.58:1 | AAA | Lc 89.3 | Fine for body text |
| #255355 text on black | 2.44:1 | Fails | Lc -12.9 | Not readable |
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 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CDDDDD
oklch(88.6% 0.017 196.8)
-
Step 300
300
#ACC7C8
oklch(81% 0.029 199.3)
-
Step 400
400
#7EAAAC
oklch(70.7% 0.047 199.6)
-
Step 500
500
#5C9597
oklch(63.1% 0.06 198.6)
-
Step 600
600
#407F82
oklch(55.6% 0.065 199.5)
-
Step 700
700
#316B6E
oklch(49% 0.061 199.9)
-
Step 800
800 (this color)
#255355
oklch(41.1% 0.05 199.2)
-
Step 900
900
#274849
oklch(37.7% 0.039 198.1)
-
Step 950
950
#172A2B
oklch(26.9% 0.025 200)
#255355 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) | #4E4F55 | 0.053 |
| Deuteranopia (no green cones) | #464A55 | 0.047 |
| Tritanopia (no blue cones) | #015653 | 0.022 |
| Achromatopsia (no color) | #4C4C4C | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255355
#255355
oklch(41.1% 0.05 199.2)
- #634040
#634040
oklch(41.2% 0.049 19.4)
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 #255355, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.015
- Deep Teal #00555A ΔE 0.020
- Dark Blue Green #005249 ΔE 0.032
- Dark Teal #014D4E ΔE 0.033
- Charcoal #264653 ΔE 0.042
- Petrol #005F6A ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.047
- Dark Green Blue #1F6357 ΔE 0.052
Use #255355 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.