#243875
Closest named color: Twilight Blue (#0A437A). oklch(36% 0.108 267.2), rgb(36, 56, 117).
Aa
White text reads best on this color (11.06:1).
About this color
#243875 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.108 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 11.06:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #243875 |
| RGB | rgb(36, 56, 117) |
| HSL | hsl(225, 53%, 30%) |
| OKLCH | oklch(36% 0.108 267.2) |
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 #243875 | 11.06:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #243875 | 1.89:1 | Fails | Lc 8.6 | Not readable |
| #243875 text on white | 11.06:1 | AAA | Lc 95.3 | Preferred for body text |
| #243875 text on black | 1.89:1 | Fails | Lc -7.3 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7D9DF1
oklch(70.7% 0.129 267.3)
-
Step 500
500
#5D82EC
oklch(63.1% 0.164 267.2)
-
Step 600
600
#4569DB
oklch(55.7% 0.179 267.2)
-
Step 700
700
#3756BE
oklch(49.1% 0.167 267.3)
-
Step 800
800
#2D4799
oklch(42.6% 0.138 267.1)
-
Step 900
900 (this color)
#243875
oklch(36% 0.108 267.2)
-
Step 950
950
#172447
oklch(26.9% 0.068 266.6)
#243875 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) | #164077 | 0.024 |
| Deuteranopia (no green cones) | #003874 | 0.028 |
| Tritanopia (no blue cones) | #004651 | 0.088 |
| Achromatopsia (no color) | #3C3C3C | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243875
#243875
oklch(36% 0.108 267.2)
- #4E3A00
#4E3A00
oklch(36.1% 0.074 86.8)
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 #243875, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Marine Blue #01386A ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.054
- Marine #042E60 ΔE 0.058
- Cobalt #1E488F ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.069
- Light Navy #155084 ΔE 0.070
Use #243875 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.