#233553
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.059 260.2), rgb(35, 53, 83).
Aa
White text reads best on this color (12.31:1).
About this color
#233553 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.059 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.010 away. White text reads best on it, at 12.31:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.70:1 |
| White text | 12.31:1 |
Values
| HEX | #233553 |
| RGB | rgb(35, 53, 83) |
| HSL | hsl(218, 41%, 23%) |
| OKLCH | oklch(32.9% 0.059 260.2) |
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 #233553 | 12.31:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #233553 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #233553 text on white | 12.31:1 | AAA | Lc 98.0 | Preferred for body text |
| #233553 text on black | 1.70:1 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B0C2DE
oklch(80.9% 0.044 259.2)
-
Step 400
400
#87A2CD
oklch(70.8% 0.07 259.6)
-
Step 500
500
#6A8AC0
oklch(63.1% 0.09 260.6)
-
Step 600
600
#5173AC
oklch(55.5% 0.098 260.3)
-
Step 700
700
#426194
oklch(49.2% 0.09 260)
-
Step 800
800
#364F78
oklch(42.7% 0.075 259.9)
-
Step 900
900 (this color)
#233553
oklch(32.9% 0.059 260.2)
-
Step 950
950
#1C2739
oklch(27.1% 0.037 260)
#233553 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) | #293754 | 0.011 |
| Deuteranopia (no green cones) | #233352 | 0.006 |
| Tritanopia (no blue cones) | #0A3C40 | 0.053 |
| Achromatopsia (no color) | #353535 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233553
#233553
oklch(32.9% 0.059 260.2)
- #45310C
#45310C
oklch(32.9% 0.059 79.1)
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 #233553, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.010
- Dark Blue Grey #1F3B4D ΔE 0.025
- Gunmetal #293241 ΔE 0.032
- Midnight Green #073B4C ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.035
- Marine Blue #01386A ΔE 0.046
- Marine #042E60 ΔE 0.047
- Onyx #343A40 ΔE 0.048
Use #233553 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.