#242857
Closest named color: Marine (#042E60). oklch(30.1% 0.084 276.5), rgb(36, 40, 87).
Aa
White text reads best on this color (13.85:1).
About this color
#242857 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.084 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.036 away. White text reads best on it, at 13.85:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.51:1 |
| White text | 13.85:1 |
Values
| HEX | #242857 |
| RGB | rgb(36, 40, 87) |
| HSL | hsl(235, 41%, 24%) |
| OKLCH | oklch(30.1% 0.084 276.5) |
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 #242857 | 13.85:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #242857 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #242857 text on white | 13.85:1 | AAA | Lc 100.3 | Preferred for body text |
| #242857 text on black | 1.51:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD7FE
oklch(88.6% 0.054 276.1)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8895FF
oklch(70.6% 0.155 276.4)
-
Step 500
500
#6E76FF
oklch(63.1% 0.2 276.5)
-
Step 600
600
#5959F0
oklch(55.6% 0.22 276.5)
-
Step 700
700
#4A47D1
oklch(49.1% 0.205 276.6)
-
Step 800
800
#3C3CA9
oklch(42.7% 0.17 276.5)
-
Step 900
900
#323586
oklch(37.7% 0.133 276.4)
-
Step 950
950 (this color)
#242857
oklch(30.1% 0.084 276.5)
#242857 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) | #112F59 | 0.028 |
| Deuteranopia (no green cones) | #0A2B56 | 0.030 |
| Tritanopia (no blue cones) | #0B323B | 0.073 |
| Achromatopsia (no color) | #2D2D2D | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #242857
#242857
oklch(30.1% 0.084 276.5)
- #372E00
#372E00
oklch(30.2% 0.062 97.4)
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 #242857, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.054
- Marine Blue #01386A ΔE 0.057
- Gunmetal #293241 ΔE 0.058
- Midnight Blue #191970 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.067
Use #242857 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.