#25424F
Closest named color: Charcoal (#264653). oklch(36.2% 0.041 228.5), rgb(37, 66, 79).
Aa
White text reads best on this color (10.65:1).
About this color
#25424F is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.041 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.014 away. White text reads best on it, at 10.65:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.97:1 |
| White text | 10.65:1 |
Values
| HEX | #25424F |
| RGB | rgb(37, 66, 79) |
| HSL | hsl(199, 36%, 23%) |
| OKLCH | oklch(36.2% 0.041 228.5) |
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 #25424F | 10.65:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #25424F | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #25424F text on white | 10.65:1 | AAA | Lc 94.6 | Preferred for body text |
| #25424F text on black | 1.97:1 | Fails | Lc -8.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE2
oklch(88.6% 0.017 225.2)
-
Step 300
300
#ADC5D1
oklch(80.9% 0.031 229.3)
-
Step 400
400
#81A7B9
oklch(70.7% 0.049 228.5)
-
Step 500
500
#5F91A8
oklch(63% 0.064 228.7)
-
Step 600
600
#447B93
oklch(55.5% 0.069 228.2)
-
Step 700
700
#36687E
oklch(49.2% 0.064 228.7)
-
Step 800
800
#2D5566
oklch(42.8% 0.053 227.6)
-
Step 900
900 (this color)
#25424F
oklch(36.2% 0.041 228.5)
-
Step 950
950
#182931
oklch(27% 0.027 229.2)
#25424F 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) | #3B4150 | 0.030 |
| Deuteranopia (no green cones) | #353C4F | 0.027 |
| Tritanopia (no blue cones) | #104646 | 0.030 |
| Achromatopsia (no color) | #3E3E3E | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25424F
#25424F
oklch(36.2% 0.041 228.5)
- #50372A
#50372A
oklch(36.2% 0.042 48.4)
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 #25424F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.014
- Dark Grey Blue #29465B ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.025
- Onyx #343A40 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.036
- Midnight Green #073B4C ΔE 0.037
- Dark Teal #014D4E ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.047
Use #25424F 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.