#242B75
Closest named color: Marine Blue (#01386A). oklch(33.3% 0.125 273.3), rgb(36, 43, 117).
Aa
White text reads best on this color (12.51:1).
About this color
#242B75 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.125 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.048 away. White text reads best on it, at 12.51:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.67:1 |
| White text | 12.51:1 |
Values
| HEX | #242B75 |
| RGB | rgb(36, 43, 117) |
| HSL | hsl(235, 53%, 30%) |
| OKLCH | oklch(33.3% 0.125 273.3) |
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 #242B75 | 12.51:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #242B75 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #242B75 text on white | 12.51:1 | AAA | Lc 98.0 | Preferred for body text |
| #242B75 text on black | 1.67:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CDD8FD
oklch(88.6% 0.052 272.2)
-
Step 300
300
#ADBDFE
oklch(81% 0.094 273.5)
-
Step 400
400
#8398FE
oklch(70.8% 0.151 273.2)
-
Step 500
500
#677AFB
oklch(63.1% 0.191 273.3)
-
Step 600
600
#515EEB
oklch(55.5% 0.21 273.4)
-
Step 700
700
#424DCC
oklch(49.1% 0.194 273.1)
-
Step 800
800
#3640A5
oklch(42.7% 0.161 273.2)
-
Step 900
900 (this color)
#242B75
oklch(33.3% 0.125 273.3)
-
Step 950
950
#1B214D
oklch(27% 0.081 273.9)
#242B75 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) | #003777 | 0.039 |
| Deuteranopia (no green cones) | #003074 | 0.032 |
| Tritanopia (no blue cones) | #003D4B | 0.103 |
| Achromatopsia (no color) | #343434 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #242B75
#242B75
oklch(33.3% 0.125 273.3)
- #423500
#423500
oklch(33.3% 0.068 93.7)
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 #242B75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.048
- Midnight Blue #191970 ΔE 0.048
- Marine #042E60 ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.063
- Twilight Blue #0A437A ΔE 0.066
- Royal #0C1793 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.086
- Cobalt #1E488F ΔE 0.086
Use #242B75 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.