#243975
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.106 266.6), rgb(36, 57, 117).
Aa
White text reads best on this color (10.95:1).
About this color
#243975 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.106 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 10.95:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #243975 |
| RGB | rgb(36, 57, 117) |
| HSL | hsl(224, 53%, 30%) |
| OKLCH | oklch(36.3% 0.106 266.6) |
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 #243975 | 10.95:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #243975 | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #243975 text on white | 10.95:1 | AAA | Lc 95.1 | Preferred for body text |
| #243975 text on black | 1.91:1 | Fails | Lc -7.6 | 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
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#A9C0F5
oklch(80.9% 0.079 266.4)
-
Step 400
400
#7C9DF0
oklch(70.6% 0.128 266.7)
-
Step 500
500
#5C82EB
oklch(63% 0.163 266.8)
-
Step 600
600
#4469D9
oklch(55.5% 0.177 266.8)
-
Step 700
700
#3657BD
oklch(49.2% 0.165 266.7)
-
Step 800
800
#2D4899
oklch(42.8% 0.136 266.7)
-
Step 900
900 (this color)
#243975
oklch(36.3% 0.106 266.6)
-
Step 950
950
#172447
oklch(26.9% 0.068 266.6)
#243975 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) | #184077 | 0.021 |
| Deuteranopia (no green cones) | #043974 | 0.025 |
| Tritanopia (no blue cones) | #004751 | 0.088 |
| Achromatopsia (no color) | #3C3C3C | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243975
#243975
oklch(36.3% 0.106 266.6)
- #4F3A00
#4F3A00
oklch(36.2% 0.074 85.7)
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 #243975, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Marine Blue #01386A ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.054
- Cobalt #1E488F ΔE 0.057
- Marine #042E60 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.067
- Light Navy #155084 ΔE 0.067
Use #243975 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.