#233257
Closest named color: Prussian Blue (#1D3557). oklch(32.4% 0.069 266), rgb(35, 50, 87).
Aa
White text reads best on this color (12.61:1).
About this color
#233257 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.069 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.011 away. White text reads best on it, at 12.61:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.61:1 |
Values
| HEX | #233257 |
| RGB | rgb(35, 50, 87) |
| HSL | hsl(223, 43%, 24%) |
| OKLCH | oklch(32.4% 0.069 266) |
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 #233257 | 12.61:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #233257 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #233257 text on white | 12.61:1 | AAA | Lc 98.5 | Preferred for body text |
| #233257 text on black | 1.66:1 | Fails | Lc 0.0 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B1C1E3
oklch(81% 0.051 265.3)
-
Step 400
400
#88A0D5
oklch(70.7% 0.083 265.5)
-
Step 500
500
#6B87CA
oklch(63% 0.107 266.1)
-
Step 600
600
#5370B7
oklch(55.6% 0.116 266)
-
Step 700
700
#445E9D
oklch(49.2% 0.106 265.7)
-
Step 800
800
#384D7F
oklch(42.8% 0.087 265.6)
-
Step 900
900 (this color)
#233257
oklch(32.4% 0.069 266)
-
Step 950
950
#1C263C
oklch(27.1% 0.044 265)
#233257 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) | #233658 | 0.013 |
| Deuteranopia (no green cones) | #1C3156 | 0.010 |
| Tritanopia (no blue cones) | #053A40 | 0.062 |
| Achromatopsia (no color) | #333333 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233257
#233257
oklch(32.4% 0.069 266)
- #433100
#433100
oklch(32.5% 0.066 86.2)
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 #233257, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.011
- Marine #042E60 ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.040
- Marine Blue #01386A ΔE 0.041
- Midnight Green #073B4C ΔE 0.045
- Onyx #343A40 ΔE 0.060
Use #233257 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.