#255D5A
Closest named color: Dark Green Blue (#1F6357). oklch(44% 0.059 190.4), rgb(37, 93, 90).
Aa
White text reads best on this color (7.52:1).
About this color
#255D5A is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.059 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.022 away. White text reads best on it, at 7.52:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.79:1 |
| White text | 7.52:1 |
Values
| HEX | #255D5A |
| RGB | rgb(37, 93, 90) |
| HSL | hsl(177, 43%, 25%) |
| OKLCH | oklch(44% 0.059 190.4) |
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 #255D5A | 7.52:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #255D5A | 2.79:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #255D5A text on white | 7.52:1 | AAA | Lc 85.9 | Fine for body text |
| #255D5A text on black | 2.79:1 | Fails | Lc -16.1 | Dividers and decoration only |
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
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A8C8C6
oklch(80.9% 0.034 191.8)
-
Step 400
400
#78ACA8
oklch(70.7% 0.055 190)
-
Step 500
500
#539793
oklch(63% 0.07 190.6)
-
Step 600
600
#33827D
oklch(55.7% 0.077 189.4)
-
Step 700
700
#256D6A
oklch(49% 0.07 191.2)
-
Step 800
800 (this color)
#255D5A
oklch(44% 0.059 190.4)
-
Step 900
900
#214947
oklch(37.6% 0.045 191.1)
-
Step 950
950
#142B2A
oklch(27% 0.029 191.9)
#255D5A 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) | #58585A | 0.063 |
| Deuteranopia (no green cones) | #4F525B | 0.058 |
| Tritanopia (no blue cones) | #005F5C | 0.017 |
| Achromatopsia (no color) | #545454 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255D5A
#255D5A
oklch(44% 0.059 190.4)
- #6F454B
#6F454B
oklch(44.1% 0.058 10.4)
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 #255D5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.022
- Petrol #005F6A ΔE 0.028
- Deep Teal #00555A ΔE 0.035
- Dark Aqua #05696B ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.043
- Dark Blue Green #005249 ΔE 0.049
- Pine #2B5D34 ΔE 0.059
- Dark Teal #014D4E ΔE 0.060
Use #255D5A 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.