#242F63
Closest named color: Prussian Blue (#1D3557). oklch(32.6% 0.092 271.4), rgb(36, 47, 99).
Aa
White text reads best on this color (12.63:1).
About this color
#242F63 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.092 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 12.63:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.63:1 |
Values
| HEX | #242F63 |
| RGB | rgb(36, 47, 99) |
| HSL | hsl(230, 47%, 26%) |
| OKLCH | oklch(32.6% 0.092 271.4) |
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 #242F63 | 12.63:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #242F63 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #242F63 text on white | 12.63:1 | AAA | Lc 98.4 | Preferred for body text |
| #242F63 text on black | 1.66:1 | 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 900.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B0BFEE
oklch(80.9% 0.069 271)
-
Step 400
400
#889CE6
oklch(70.7% 0.111 271.8)
-
Step 500
500
#6B82DF
oklch(63.1% 0.142 271.4)
-
Step 600
600
#5469CC
oklch(55.5% 0.154 271.5)
-
Step 700
700
#4557B1
oklch(49.1% 0.144 271.6)
-
Step 800
800
#38488F
oklch(42.7% 0.118 271.1)
-
Step 900
900 (this color)
#242F63
oklch(32.6% 0.092 271.4)
-
Step 950
950
#1C2443
oklch(27% 0.059 271.1)
#242F63 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) | #143665 | 0.025 |
| Deuteranopia (no green cones) | #083062 | 0.028 |
| Tritanopia (no blue cones) | #003B44 | 0.081 |
| Achromatopsia (no color) | #333333 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #242F63
#242F63
oklch(32.6% 0.092 271.4)
- #413300
#413300
oklch(32.7% 0.067 91.9)
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 #242F63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Marine #042E60 ΔE 0.033
- Marine Blue #01386A ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.060
- Midnight Blue #191970 ΔE 0.064
- Gunmetal #293241 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.066
Use #242F63 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.