#023A7E
Closest named color: Twilight Blue (#0A437A). oklch(36.1% 0.127 257.3), rgb(2, 58, 126).
Aa
White text reads best on this color (11.00:1).
About this color
#023A7E is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.127 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.029 away. White text reads best on it, at 11.00:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.00:1 |
Values
| HEX | #023A7E |
| RGB | rgb(2, 58, 126) |
| HSL | hsl(213, 97%, 25%) |
| OKLCH | oklch(36.1% 0.127 257.3) |
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 #023A7E | 11.00:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #023A7E | 1.90:1 | Fails | Lc 9.1 | Not readable |
| #023A7E text on white | 11.00:1 | AAA | Lc 94.8 | Preferred for body text |
| #023A7E text on black | 1.90:1 | Fails | Lc -7.8 | 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
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFD
oklch(88.5% 0.053 258)
-
Step 300
300
#99C3FE
oklch(80.9% 0.095 256.9)
-
Step 400
400
#5FA1FE
oklch(70.7% 0.153 257.2)
-
Step 500
500
#2D86FC
oklch(63.2% 0.195 257.3)
-
Step 600
600
#006DE4
oklch(55.5% 0.199 257.3)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#004BA0
oklch(42.8% 0.152 257.1)
-
Step 900
900 (this color)
#023A7E
oklch(36.1% 0.127 257.3)
-
Step 950
950
#08254D
oklch(26.9% 0.082 257.6)
#023A7E 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) | #064280 | 0.024 |
| Deuteranopia (no green cones) | #00377D | 0.009 |
| Tritanopia (no blue cones) | #004B56 | 0.096 |
| Achromatopsia (no color) | #3C3C3C | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023A7E
#023A7E
oklch(36.1% 0.127 257.3)
- #533700
#533700
oklch(36% 0.075 77.1)
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 #023A7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.029
- Marine Blue #01386A ΔE 0.035
- Cobalt #1E488F ΔE 0.054
- Marine #042E60 ΔE 0.061
- Light Navy #155084 ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.068
- Deep Sea Blue #015482 ΔE 0.077
- Sapphire #2138AB ΔE 0.079
Use #023A7E 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.