#242F5D
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.083 271), rgb(36, 47, 93).
Aa
White text reads best on this color (12.80:1).
About this color
#242F5D is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.083 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.024 away. White text reads best on it, at 12.80:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.63:1 |
| White text | 12.80:1 |
Values
| HEX | #242F5D |
| RGB | rgb(36, 47, 93) |
| HSL | hsl(228, 44%, 25%) |
| OKLCH | oklch(32.1% 0.083 271) |
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 #242F5D | 12.80:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #242F5D | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #242F5D text on white | 12.80:1 | AAA | Lc 98.8 | Preferred for body text |
| #242F5D text on black | 1.63:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#495FF0
oklch(55.7% 0.217 270.9)
-
Step 700
700
#3B4DD1
oklch(49.2% 0.202 270.8)
-
Step 800
800
#3140A9
oklch(42.8% 0.168 271.1)
-
Step 900
900
#2A3886
oklch(37.8% 0.131 271.1)
-
Step 950
950 (this color)
#242F5D
oklch(32.1% 0.083 271)
#242F5D 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) | #1A355F | 0.020 |
| Deuteranopia (no green cones) | #12305C | 0.021 |
| Tritanopia (no blue cones) | #013941 | 0.074 |
| Achromatopsia (no color) | #323232 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #242F5D
#242F5D
oklch(32.1% 0.083 271)
- #403100
#403100
oklch(32.1% 0.066 90)
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 #242F5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.024
- Marine #042E60 ΔE 0.032
- Marine Blue #01386A ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.053
- Gunmetal #293241 ΔE 0.054
- Midnight Green #073B4C ΔE 0.059
- Oxford Blue #1B263B ΔE 0.067
Use #242F5D 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.