#023A78
Closest named color: Marine Blue (#01386A). oklch(35.6% 0.119 255.9), rgb(2, 58, 120).
Aa
White text reads best on this color (11.17:1).
About this color
#023A78 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.119 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.025 away. White text reads best on it, at 11.17:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #023A78 |
| RGB | rgb(2, 58, 120) |
| HSL | hsl(212, 97%, 24%) |
| OKLCH | oklch(35.6% 0.119 255.9) |
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 #023A78 | 11.17:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #023A78 | 1.87:1 | Fails | Lc 8.7 | Not readable |
| #023A78 text on white | 11.17:1 | AAA | Lc 95.2 | Preferred for body text |
| #023A78 text on black | 1.87:1 | Fails | Lc -7.5 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9BC3FA
oklch(80.8% 0.089 256.5)
-
Step 400
400
#61A2F7
oklch(70.6% 0.142 255.8)
-
Step 500
500
#3088F4
oklch(63.1% 0.182 255.9)
-
Step 600
600
#006FDE
oklch(55.5% 0.189 256)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900 (this color)
#023A78
oklch(35.6% 0.119 255.9)
-
Step 950
950
#09264A
oklch(27% 0.075 255.8)
#023A78 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) | #12407A | 0.021 |
| Deuteranopia (no green cones) | #003677 | 0.012 |
| Tritanopia (no blue cones) | #004953 | 0.088 |
| Achromatopsia (no color) | #3B3B3B | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023A78
#023A78
oklch(35.6% 0.119 255.9)
- #523600
#523600
oklch(35.7% 0.075 76.7)
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 #023A78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Twilight Blue #0A437A ΔE 0.028
- Marine #042E60 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.058
- Cobalt #1E488F ΔE 0.060
- Light Navy #155084 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.076
- Dark Blue Grey #1F3B4D ΔE 0.077
Use #023A78 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.