#243259
Closest named color: Prussian Blue (#1D3557). oklch(32.6% 0.072 267.5), rgb(36, 50, 89).
Aa
White text reads best on this color (12.53:1).
About this color
#243259 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.072 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.013 away. White text reads best on it, at 12.53:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.53:1 |
Values
| HEX | #243259 |
| RGB | rgb(36, 50, 89) |
| HSL | hsl(224, 42%, 25%) |
| OKLCH | oklch(32.6% 0.072 267.5) |
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 #243259 | 12.53:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #243259 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #243259 text on white | 12.53:1 | AAA | Lc 98.3 | Preferred for body text |
| #243259 text on black | 1.67:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B1C0E4
oklch(80.8% 0.054 267.4)
-
Step 400
400
#899FD7
oklch(70.7% 0.086 267.6)
-
Step 500
500
#6C86CC
oklch(63% 0.11 267.7)
-
Step 600
600
#546FB9
oklch(55.5% 0.12 267.3)
-
Step 700
700
#455DA0
oklch(49.2% 0.111 267.4)
-
Step 800
800
#394C81
oklch(42.7% 0.091 267.6)
-
Step 900
900 (this color)
#243259
oklch(32.6% 0.072 267.5)
-
Step 950
950
#1D253D
oklch(26.9% 0.046 269.1)
#243259 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) | #22365B | 0.012 |
| Deuteranopia (no green cones) | #1B3158 | 0.013 |
| Tritanopia (no blue cones) | #063B41 | 0.065 |
| Achromatopsia (no color) | #343434 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243259
#243259
oklch(32.6% 0.072 267.5)
- #433200
#433200
oklch(32.7% 0.067 87.8)
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 #243259, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.013
- Marine #042E60 ΔE 0.037
- Marine Blue #01386A ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.041
- Gunmetal #293241 ΔE 0.044
- Midnight Green #073B4C ΔE 0.048
- Onyx #343A40 ΔE 0.063
Use #243259 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.