#233A6E
Closest named color: Marine Blue (#01386A). oklch(35.9% 0.095 264.2), rgb(35, 58, 110).
Aa
White text reads best on this color (11.04:1).
About this color
#233A6E is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.095 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.029 away. White text reads best on it, at 11.04:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #233A6E |
| RGB | rgb(35, 58, 110) |
| HSL | hsl(222, 52%, 28%) |
| OKLCH | oklch(35.9% 0.095 264.2) |
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 #233A6E | 11.04:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #233A6E | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #233A6E text on white | 11.04:1 | AAA | Lc 95.3 | Preferred for body text |
| #233A6E text on black | 1.90:1 | Fails | Lc -7.3 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCD9F4
oklch(88.4% 0.04 265.1)
-
Step 300
300
#AAC1EF
oklch(81% 0.07 264.1)
-
Step 400
400
#7D9FE8
oklch(70.7% 0.114 264.6)
-
Step 500
500
#5C86E1
oklch(63.2% 0.145 264)
-
Step 600
600
#436DCE
oklch(55.5% 0.157 264.3)
-
Step 700
700
#355BB3
oklch(49.2% 0.147 264.2)
-
Step 800
800
#2C4B91
oklch(42.8% 0.121 264)
-
Step 900
900 (this color)
#233A6E
oklch(35.9% 0.095 264.2)
-
Step 950
950
#172544
oklch(27% 0.061 264.4)
#233A6E 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) | #214070 | 0.018 |
| Deuteranopia (no green cones) | #14396D | 0.016 |
| Tritanopia (no blue cones) | #00464E | 0.079 |
| Achromatopsia (no color) | #3C3C3C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233A6E
#233A6E
oklch(35.9% 0.095 264.2)
- #4F3900
#4F3900
oklch(36% 0.074 84.3)
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 #233A6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.029
- Twilight Blue #0A437A ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.042
- Marine #042E60 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.060
- Cobalt #1E488F ΔE 0.064
- Midnight Green #073B4C ΔE 0.068
Use #233A6E 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.