#255A53
Closest named color: Dark Green Blue (#1F6357). oklch(43% 0.058 183.7), rgb(37, 90, 83).
Aa
White text reads best on this color (7.87:1).
About this color
#255A53 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.058 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.028 away. White text reads best on it, at 7.87:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #255A53 |
| RGB | rgb(37, 90, 83) |
| HSL | hsl(172, 42%, 25%) |
| OKLCH | oklch(43% 0.058 183.7) |
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 #255A53 | 7.87:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #255A53 | 2.66:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #255A53 text on white | 7.87:1 | AAA | Lc 87.2 | Fine for body text |
| #255A53 text on black | 2.66:1 | Fails | Lc -15.0 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDDDA
oklch(88.4% 0.019 184.2)
-
Step 300
300
#AAC8C3
oklch(80.9% 0.033 184.4)
-
Step 400
400
#7BACA4
oklch(70.7% 0.053 183.6)
-
Step 500
500
#56978E
oklch(63% 0.068 184.3)
-
Step 600
600
#388278
oklch(55.7% 0.075 183.4)
-
Step 700
700
#2A6E65
oklch(49.2% 0.07 183.3)
-
Step 800
800 (this color)
#255A53
oklch(43% 0.058 183.7)
-
Step 900
900
#234944
oklch(37.6% 0.044 184.5)
-
Step 950
950
#152B28
oklch(27% 0.029 184.5)
#255A53 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) | #565553 | 0.062 |
| Deuteranopia (no green cones) | #4D4F54 | 0.057 |
| Tritanopia (no blue cones) | #005C58 | 0.018 |
| Achromatopsia (no color) | #515151 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255A53
#255A53
oklch(43% 0.058 183.7)
- #6B424C
#6B424C
oklch(43% 0.058 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 #255A53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.028
- Deep Teal #00555A ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.035
- Petrol #005F6A ΔE 0.037
- Dark Blue Green #005249 ΔE 0.038
- Dark Teal #014D4E ΔE 0.051
- Dark Aqua #05696B ΔE 0.051
- Pine #2B5D34 ΔE 0.052
Use #255A53 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.