#233D61
Closest named color: Prussian Blue (#1D3557). oklch(35.8% 0.071 256.8), rgb(35, 61, 97).
Aa
White text reads best on this color (10.98:1).
About this color
#233D61 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.071 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.030 away. White text reads best on it, at 10.98:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.91:1 |
| White text | 10.98:1 |
Values
| HEX | #233D61 |
| RGB | rgb(35, 61, 97) |
| HSL | hsl(215, 47%, 26%) |
| OKLCH | oklch(35.8% 0.071 256.8) |
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 #233D61 | 10.98:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #233D61 | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #233D61 text on white | 10.98:1 | AAA | Lc 95.3 | Preferred for body text |
| #233D61 text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EAF4
oklch(93.5% 0.015 257.2)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC3E3
oklch(81% 0.052 255.7)
-
Step 400
400
#7EA3D5
oklch(70.7% 0.084 256.1)
-
Step 500
500
#5D8BCA
oklch(63.1% 0.108 256.5)
-
Step 600
600
#4374B7
oklch(55.6% 0.118 256.7)
-
Step 700
700
#35619E
oklch(49.1% 0.11 257)
-
Step 800
800
#2C4F80
oklch(42.6% 0.091 257.1)
-
Step 900
900 (this color)
#233D61
oklch(35.8% 0.071 256.8)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#233D61 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) | #2E3F62 | 0.016 |
| Deuteranopia (no green cones) | #263A60 | 0.009 |
| Tritanopia (no blue cones) | #00454A | 0.060 |
| Achromatopsia (no color) | #3C3C3C | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233D61
#233D61
oklch(35.8% 0.071 256.8)
- #513706
#513706
oklch(35.8% 0.071 77.3)
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 #233D61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.036
- Marine Blue #01386A ΔE 0.037
- Charcoal #264653 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.045
- Midnight Green #073B4C ΔE 0.046
- Marine #042E60 ΔE 0.058
Use #233D61 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.