#25525A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41% 0.051 210.6), rgb(37, 82, 90).
Aa
White text reads best on this color (8.63:1).
About this color
#25525A is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.051 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.019 away. White text reads best on it, at 8.63:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #25525A |
| RGB | rgb(37, 82, 90) |
| HSL | hsl(189, 42%, 25%) |
| OKLCH | oklch(41% 0.051 210.6) |
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 #25525A | 8.63:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #25525A | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #25525A text on white | 8.63:1 | AAA | Lc 89.5 | Fine for body text |
| #25525A text on black | 2.43:1 | Fails | Lc -12.8 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ACC6CB
oklch(80.9% 0.029 210.5)
-
Step 400
400
#7EA9B1
oklch(70.6% 0.048 210.3)
-
Step 500
500
#5C949E
oklch(63.2% 0.061 210.1)
-
Step 600
600
#407E89
oklch(55.6% 0.066 210.4)
-
Step 700
700
#316A74
oklch(49% 0.061 210.5)
-
Step 800
800 (this color)
#25525A
oklch(41% 0.051 210.6)
-
Step 900
900
#27474D
oklch(37.6% 0.039 210.9)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#25525A 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) | #4B4F5B | 0.048 |
| Deuteranopia (no green cones) | #43495A | 0.044 |
| Tritanopia (no blue cones) | #005654 | 0.027 |
| Achromatopsia (no color) | #4C4C4C | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25525A
#25525A
oklch(41% 0.051 210.6)
- #63403A
#63403A
oklch(41% 0.05 30.1)
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 #25525A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.019
- Deep Teal #00555A ΔE 0.021
- Dark Teal #014D4E ΔE 0.035
- Charcoal #264653 ΔE 0.038
- Dark Blue Green #005249 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.040
- Petrol #005F6A ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.058
Use #25525A 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.