#243965
Closest named color: Prussian Blue (#1D3557). oklch(35.1% 0.081 263.5), rgb(36, 57, 101).
Aa
White text reads best on this color (11.36:1).
About this color
#243965 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.081 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.028 away. White text reads best on it, at 11.36:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.84:1 |
| White text | 11.36:1 |
Values
| HEX | #243965 |
| RGB | rgb(36, 57, 101) |
| HSL | hsl(221, 47%, 27%) |
| OKLCH | oklch(35.1% 0.081 263.5) |
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 #243965 | 11.36:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #243965 | 1.84:1 | Fails | Lc 7.9 | Not readable |
| #243965 text on white | 11.36:1 | AAA | Lc 96.0 | Preferred for body text |
| #243965 text on black | 1.84:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#81A0DE
oklch(70.7% 0.098 263.6)
-
Step 500
500
#6187D5
oklch(63% 0.126 263.5)
-
Step 600
600
#4970C2
oklch(55.7% 0.135 263.5)
-
Step 700
700
#3A5DA8
oklch(49.1% 0.127 263.6)
-
Step 800
800
#304C88
oklch(42.6% 0.105 263.7)
-
Step 900
900 (this color)
#243965
oklch(35.1% 0.081 263.5)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#243965 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) | #263D67 | 0.013 |
| Deuteranopia (no green cones) | #1D3764 | 0.011 |
| Tritanopia (no blue cones) | #00434A | 0.070 |
| Achromatopsia (no color) | #3A3A3A | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243965
#243965
oklch(35.1% 0.081 263.5)
- #4D3700
#4D3700
oklch(35.2% 0.072 83.6)
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 #243965, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.028
- Marine Blue #01386A ΔE 0.029
- Twilight Blue #0A437A ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.046
- Marine #042E60 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.050
- Midnight Green #073B4C ΔE 0.055
- Charcoal #264653 ΔE 0.059
Use #243965 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.