#183258
Closest named color: Prussian Blue (#1D3557). oklch(31.8% 0.075 257.9), rgb(24, 50, 88).
Aa
White text reads best on this color (12.83:1).
About this color
#183258 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.075 and its hue 258°. 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 12.83:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.63:1 |
| White text | 12.83:1 |
Values
| HEX | #183258 |
| RGB | rgb(24, 50, 88) |
| HSL | hsl(216, 57%, 22%) |
| OKLCH | oklch(31.8% 0.075 257.9) |
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 #183258 | 12.83:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #183258 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #183258 text on white | 12.83:1 | AAA | Lc 98.8 | Preferred for body text |
| #183258 text on black | 1.63:1 | 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 950.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3FA
oklch(81% 0.088 257.6)
-
Step 400
400
#66A1F8
oklch(70.7% 0.142 258)
-
Step 500
500
#3986F5
oklch(63% 0.183 258.1)
-
Step 600
600
#0D6DE4
oklch(55.6% 0.198 257.9)
-
Step 700
700
#005AC4
oklch(49% 0.181 258)
-
Step 800
800
#054AA0
oklch(42.6% 0.153 257.9)
-
Step 900
900
#113F7F
oklch(37.7% 0.119 258)
-
Step 950
950 (this color)
#183258
oklch(31.8% 0.075 257.9)
#183258 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) | #21355A | 0.016 |
| Deuteranopia (no green cones) | #172F57 | 0.010 |
| Tritanopia (no blue cones) | #003B40 | 0.062 |
| Achromatopsia (no color) | #323232 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183258
#183258
oklch(31.8% 0.075 257.9)
- #452D00
#452D00
oklch(31.8% 0.067 77)
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 #183258, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.012
- Marine #042E60 ΔE 0.027
- Marine Blue #01386A ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.041
- Midnight Green #073B4C ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.059
Use #183258 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.