#023C77
Closest named color: Twilight Blue (#0A437A). oklch(36% 0.115 254.6), rgb(2, 60, 119).
Aa
White text reads best on this color (10.96:1).
About this color
#023C77 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.115 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.022 away. White text reads best on it, at 10.96:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #023C77 |
| RGB | rgb(2, 60, 119) |
| HSL | hsl(210, 97%, 24%) |
| OKLCH | oklch(36% 0.115 254.6) |
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 #023C77 | 10.96:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #023C77 | 1.91:1 | Fails | Lc 9.1 | Not readable |
| #023C77 text on white | 10.96:1 | AAA | Lc 94.8 | Preferred for body text |
| #023C77 text on black | 1.91:1 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBF9
oklch(88.4% 0.048 255.1)
-
Step 300
300
#9BC4F8
oklch(81% 0.086 254.6)
-
Step 400
400
#61A3F4
oklch(70.7% 0.137 254.5)
-
Step 500
500
#2E89F0
oklch(63% 0.176 254.6)
-
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)
#023C77
oklch(36% 0.115 254.6)
-
Step 950
950
#092649
oklch(26.9% 0.074 255.3)
#023C77 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) | #194279 | 0.025 |
| Deuteranopia (no green cones) | #003876 | 0.012 |
| Tritanopia (no blue cones) | #004A53 | 0.085 |
| Achromatopsia (no color) | #3C3C3C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023C77
#023C77
oklch(36% 0.115 254.6)
- #543600
#543600
oklch(36% 0.076 74.7)
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 #023C77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.022
- Marine Blue #01386A ΔE 0.025
- Marine #042E60 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.057
- Light Navy #155084 ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.070
- Deep Sea Blue #015482 ΔE 0.073
Use #023C77 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.