#25504D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.048 189.4), rgb(37, 80, 77).
Aa
White text reads best on this color (9.00:1).
About this color
#25504D is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.048 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.012 away. White text reads best on it, at 9.00:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #25504D |
| RGB | rgb(37, 80, 77) |
| HSL | hsl(176, 37%, 23%) |
| OKLCH | oklch(40% 0.048 189.4) |
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 #25504D | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #25504D | 2.33:1 | Fails | Lc 13.4 | Not readable |
| #25504D text on white | 9.00:1 | AAA | Lc 90.5 | Preferred for body text |
| #25504D text on black | 2.33:1 | Fails | Lc -11.8 | 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 900.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDC
oklch(88.6% 0.02 189.2)
-
Step 300
300
#A7C9C5
oklch(81% 0.037 187.7)
-
Step 400
400
#76ADA8
oklch(70.8% 0.058 188.8)
-
Step 500
500
#4F9893
oklch(63.1% 0.074 189.6)
-
Step 600
600
#2E827D
oklch(55.5% 0.08 189.6)
-
Step 700
700
#1F6E6A
oklch(49.1% 0.074 190.1)
-
Step 800
800
#1D5A56
oklch(42.8% 0.062 189)
-
Step 900
900 (this color)
#25504D
oklch(40% 0.048 189.4)
-
Step 950
950
#132B2A
oklch(26.9% 0.03 192)
#25504D 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) | #4C4C4D | 0.051 |
| Deuteranopia (no green cones) | #45474D | 0.048 |
| Tritanopia (no blue cones) | #0C524F | 0.016 |
| Achromatopsia (no color) | #494949 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25504D
#25504D
oklch(40% 0.048 189.4)
- #5E3D42
#5E3D42
oklch(40% 0.047 9.5)
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 #25504D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.012
- Dark Blue Green #005249 ΔE 0.024
- Dark Teal #014D4E ΔE 0.026
- Deep Teal #00555A ΔE 0.026
- Charcoal #264653 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.051
- Petrol #005F6A ΔE 0.057
Use #25504D 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.