#242F7F
Closest named color: Marine Blue (#01386A). oklch(35% 0.135 271.5), rgb(36, 47, 127).
Aa
White text reads best on this color (11.74:1).
About this color
#242F7F is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.135 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.052 away. White text reads best on it, at 11.74:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.78:1 |
| White text | 11.74:1 |
Values
| HEX | #242F7F |
| RGB | rgb(36, 47, 127) |
| HSL | hsl(233, 56%, 32%) |
| OKLCH | oklch(35% 0.135 271.5) |
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 #242F7F | 11.74:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #242F7F | 1.78:1 | Fails | Lc 7.4 | Not readable |
| #242F7F text on white | 11.74:1 | AAA | Lc 96.5 | Preferred for body text |
| #242F7F text on black | 1.78:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F98FF
oklch(70.6% 0.153 271.7)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#4A5DF3
oklch(55.6% 0.223 271.4)
-
Step 700
700
#3C4BD4
oklch(49.1% 0.208 271.4)
-
Step 800
800
#313EAB
oklch(42.6% 0.173 271.6)
-
Step 900
900 (this color)
#242F7F
oklch(35% 0.135 271.5)
-
Step 950
950
#18214F
oklch(26.9% 0.085 271.3)
#242F7F 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) | #003C82 | 0.039 |
| Deuteranopia (no green cones) | #00347D | 0.030 |
| Tritanopia (no blue cones) | #004352 | 0.108 |
| Achromatopsia (no color) | #383838 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #242F7F
#242F7F
oklch(35% 0.135 271.5)
- #483900
#483900
oklch(35.1% 0.072 92.3)
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 #242F7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.052
- Twilight Blue #0A437A ΔE 0.057
- Midnight Blue #191970 ΔE 0.062
- Marine #042E60 ΔE 0.064
- Royal #0C1793 ΔE 0.065
- Cobalt #1E488F ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.073
- Prussian Blue #1D3557 ΔE 0.074
Use #242F7F 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.