#25515E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.9% 0.053 219.7), rgb(37, 81, 94).
Aa
White text reads best on this color (8.68:1).
About this color
#25515E is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.053 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.025 away. White text reads best on it, at 8.68:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #25515E |
| RGB | rgb(37, 81, 94) |
| HSL | hsl(194, 44%, 26%) |
| OKLCH | oklch(40.9% 0.053 219.7) |
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 #25515E | 8.68:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #25515E | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #25515E text on white | 8.68:1 | AAA | Lc 89.6 | Fine for body text |
| #25515E text on black | 2.41:1 | Fails | Lc -12.6 | 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
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ACC6CE
oklch(81% 0.03 218.3)
-
Step 400
400
#7EA8B6
oklch(70.6% 0.05 220.4)
-
Step 500
500
#5C93A4
oklch(63.1% 0.063 219.5)
-
Step 600
600
#407D8F
oklch(55.6% 0.069 219.4)
-
Step 700
700
#32697A
oklch(49.1% 0.064 220.7)
-
Step 800
800 (this color)
#25515E
oklch(40.9% 0.053 219.7)
-
Step 900
900
#274751
oklch(37.8% 0.041 220.1)
-
Step 950
950
#172A2F
oklch(27.1% 0.026 216.3)
#25515E 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) | #494F5F | 0.045 |
| Deuteranopia (no green cones) | #41495E | 0.040 |
| Tritanopia (no blue cones) | #005555 | 0.031 |
| Achromatopsia (no color) | #4B4B4B | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25515E
#25515E
oklch(40.9% 0.053 219.7)
- #634034
#634034
oklch(40.9% 0.053 39.7)
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 #25515E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.025
- Deep Teal #00555A ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.036
- Dark Teal #014D4E ΔE 0.039
- Petrol #005F6A ΔE 0.044
- Dark Blue Green #005249 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.059
Use #25515E 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.