#233451
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.057 260.6), rgb(35, 52, 81).
Aa
White text reads best on this color (12.48:1).
About this color
#233451 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.057 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.012 away. White text reads best on it, at 12.48:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.48:1 |
Values
| HEX | #233451 |
| RGB | rgb(35, 52, 81) |
| HSL | hsl(218, 40%, 23%) |
| OKLCH | oklch(32.5% 0.057 260.6) |
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 #233451 | 12.48:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #233451 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #233451 text on white | 12.48:1 | AAA | Lc 98.3 | Preferred for body text |
| #233451 text on black | 1.68:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DD
oklch(81% 0.043 259.6)
-
Step 400
400
#89A2CC
oklch(70.8% 0.068 260.7)
-
Step 500
500
#6B8ABE
oklch(63.1% 0.086 260.5)
-
Step 600
600
#5373AB
oklch(55.6% 0.095 261.1)
-
Step 700
700
#436092
oklch(48.9% 0.088 260.8)
-
Step 800
800
#384F77
oklch(42.8% 0.073 261)
-
Step 900
900 (this color)
#233451
oklch(32.5% 0.057 260.6)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#233451 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) | #293652 | 0.011 |
| Deuteranopia (no green cones) | #233250 | 0.006 |
| Tritanopia (no blue cones) | #0C3A3E | 0.051 |
| Achromatopsia (no color) | #343434 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233451
#233451
oklch(32.5% 0.057 260.6)
- #43310D
#43310D
oklch(32.6% 0.057 81.4)
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 #233451, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.012
- Dark Blue Grey #1F3B4D ΔE 0.026
- Gunmetal #293241 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.031
- Midnight Green #073B4C ΔE 0.035
- Marine #042E60 ΔE 0.047
- Onyx #343A40 ΔE 0.048
- Marine Blue #01386A ΔE 0.049
Use #233451 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.