#024378
Closest named color: Twilight Blue (#0A437A). oklch(37.8% 0.107 250.7), rgb(2, 67, 120).
Aa
White text reads best on this color (10.11:1).
About this color
#024378 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.107 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.005 away. White text reads best on it, at 10.11:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.07:1 |
| White text | 10.11:1 |
Values
| HEX | #024378 |
| RGB | rgb(2, 67, 120) |
| HSL | hsl(207, 97%, 24%) |
| OKLCH | oklch(37.8% 0.107 250.7) |
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 #024378 | 10.11:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #024378 | 2.07:1 | Fails | Lc 11.0 | Not readable |
| #024378 text on white | 10.11:1 | AAA | Lc 92.9 | Preferred for body text |
| #024378 text on black | 2.07:1 | Fails | Lc -9.6 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9AC5F3
oklch(80.9% 0.08 250.5)
-
Step 400
400
#5EA5EE
oklch(70.7% 0.129 250.7)
-
Step 500
500
#268CE8
oklch(63% 0.165 250.8)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900 (this color)
#024378
oklch(37.8% 0.107 250.7)
-
Step 950
950
#072746
oklch(26.9% 0.068 251.4)
#024378 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) | #27477A | 0.030 |
| Deuteranopia (no green cones) | #113D77 | 0.018 |
| Tritanopia (no blue cones) | #005057 | 0.079 |
| Achromatopsia (no color) | #424242 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #024378
#024378
oklch(37.8% 0.107 250.7)
- #5D3900
#5D3900
oklch(37.9% 0.082 70.4)
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 #024378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.005
- Marine Blue #01386A ΔE 0.039
- Light Navy #155084 ΔE 0.045
- Cobalt #1E488F ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.058
- Dusk Blue #26538D ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.065
Use #024378 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.