#023E7B
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.118 254.6), rgb(2, 62, 123).
Aa
White text reads best on this color (10.61:1).
About this color
#023E7B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.118 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.016 away. White text reads best on it, at 10.61:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #023E7B |
| RGB | rgb(2, 62, 123) |
| HSL | hsl(210, 97%, 25%) |
| OKLCH | oklch(36.8% 0.118 254.6) |
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 #023E7B | 10.61:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #023E7B | 1.97:1 | Fails | Lc 9.9 | Not readable |
| #023E7B text on white | 10.61:1 | AAA | Lc 94.0 | Preferred for body text |
| #023E7B text on black | 1.97:1 | Fails | Lc -8.5 | 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
#9AC4F9
oklch(80.9% 0.088 254.5)
-
Step 400
400
#5FA3F6
oklch(70.7% 0.141 254.4)
-
Step 500
500
#2A89F3
oklch(63.1% 0.181 254.6)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900 (this color)
#023E7B
oklch(36.8% 0.118 254.6)
-
Step 950
950
#08264A
oklch(26.9% 0.075 255.4)
#023E7B 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) | #1A447D | 0.025 |
| Deuteranopia (no green cones) | #003A7A | 0.012 |
| Tritanopia (no blue cones) | #004D56 | 0.088 |
| Achromatopsia (no color) | #3E3E3E | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023E7B
#023E7B
oklch(36.8% 0.118 254.6)
- #573800
#573800
oklch(36.8% 0.078 74.5)
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 #023E7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.016
- Marine Blue #01386A ΔE 0.033
- Cobalt #1E488F ΔE 0.049
- Light Navy #155084 ΔE 0.057
- Marine #042E60 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.071
Use #023E7B 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.