#243255
Closest named color: Prussian Blue (#1D3557). oklch(32.3% 0.065 266.3), rgb(36, 50, 85).
Aa
White text reads best on this color (12.63:1).
About this color
#243255 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.065 and its hue 266°. 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 12.63:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.63:1 |
Values
| HEX | #243255 |
| RGB | rgb(36, 50, 85) |
| HSL | hsl(223, 40%, 24%) |
| OKLCH | oklch(32.3% 0.065 266.3) |
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 #243255 | 12.63:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #243255 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #243255 text on white | 12.63:1 | AAA | Lc 98.5 | Preferred for body text |
| #243255 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 950.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F4
oklch(80.9% 0.078 266.8)
-
Step 400
400
#7D9EEE
oklch(70.8% 0.123 266.3)
-
Step 500
500
#5D83E8
oklch(63.1% 0.158 266.4)
-
Step 600
600
#446AD7
oklch(55.6% 0.173 266.4)
-
Step 700
700
#3658BA
oklch(49.1% 0.16 266.2)
-
Step 800
800
#2D4896
oklch(42.6% 0.132 266.4)
-
Step 900
900
#283D78
oklch(37.6% 0.104 266.7)
-
Step 950
950 (this color)
#243255
oklch(32.3% 0.065 266.3)
#243255 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) | #243556 | 0.009 |
| Deuteranopia (no green cones) | #1E3154 | 0.009 |
| Tritanopia (no blue cones) | #0B3A3F | 0.060 |
| Achromatopsia (no color) | #333333 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243255
#243255
oklch(32.3% 0.065 266.3)
- #423101
#423101
oklch(32.4% 0.065 87.1)
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 #243255, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.012
- Space Cadet #2B2D42 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.036
- Gunmetal #293241 ΔE 0.037
- Marine #042E60 ΔE 0.040
- Midnight Green #073B4C ΔE 0.044
- Marine Blue #01386A ΔE 0.044
- Onyx #343A40 ΔE 0.057
Use #243255 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.