#25554D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.4% 0.054 181.2), rgb(37, 85, 77).
Aa
White text reads best on this color (8.44:1).
About this color
#25554D is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.054 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.023 away. White text reads best on it, at 8.44:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #25554D |
| RGB | rgb(37, 85, 77) |
| HSL | hsl(170, 39%, 24%) |
| OKLCH | oklch(41.4% 0.054 181.2) |
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 #25554D | 8.44:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #25554D | 2.48:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #25554D text on white | 8.44:1 | AAA | Lc 89.0 | Fine for body text |
| #25554D text on black | 2.48:1 | Fails | Lc -13.3 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#ABC8C2
oklch(81% 0.032 181.6)
-
Step 400
400
#7EABA2
oklch(70.6% 0.05 181.1)
-
Step 500
500
#5B978C
oklch(63.2% 0.065 181.1)
-
Step 600
600
#3F8176
oklch(55.7% 0.07 181.4)
-
Step 700
700
#306D63
oklch(49.1% 0.065 181.3)
-
Step 800
800 (this color)
#25554D
oklch(41.4% 0.054 181.2)
-
Step 900
900
#264943
oklch(37.7% 0.042 181.6)
-
Step 950
950
#172B27
oklch(27.1% 0.027 180)
#25554D 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) | #51504D | 0.057 |
| Deuteranopia (no green cones) | #4A4B4E | 0.054 |
| Tritanopia (no blue cones) | #0A5653 | 0.017 |
| Achromatopsia (no color) | #4D4D4D | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25554D
#25554D
oklch(41.4% 0.054 181.2)
- #643F49
#643F49
oklch(41.4% 0.054 2.1)
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 #25554D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.023
- Dark Blue Green #005249 ΔE 0.026
- Deep Teal #00555A ΔE 0.027
- Dark Teal #014D4E ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.043
- Petrol #005F6A ΔE 0.049
- Pine #2B5D34 ΔE 0.054
- Charcoal #264653 ΔE 0.054
Use #25554D 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.