#24398F
Closest named color: Cobalt (#1E488F). oklch(38.4% 0.144 268.3), rgb(36, 57, 143).
Aa
White text reads best on this color (10.20:1).
About this color
#24398F is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.144 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.039 away. White text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #24398F |
| RGB | rgb(36, 57, 143) |
| HSL | hsl(228, 60%, 35%) |
| OKLCH | oklch(38.4% 0.144 268.3) |
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 #24398F | 10.20:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #24398F | 2.05:1 | Fails | Lc 10.7 | Not readable |
| #24398F text on white | 10.20:1 | AAA | Lc 93.2 | Preferred for body text |
| #24398F text on black | 2.05:1 | Fails | Lc -9.3 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789AFF
oklch(70.6% 0.153 268.3)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#3C5CFD
oklch(55.7% 0.24 268.3)
-
Step 700
700
#2F4ADD
oklch(49.2% 0.224 268.2)
-
Step 800
800
#273EB2
oklch(42.7% 0.185 268.3)
-
Step 900
900 (this color)
#24398F
oklch(38.4% 0.144 268.3)
-
Step 950
950
#142152
oklch(26.9% 0.091 268.4)
#24398F 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) | #004692 | 0.037 |
| Deuteranopia (no green cones) | #003C8D | 0.025 |
| Tritanopia (no blue cones) | #004F5E | 0.116 |
| Achromatopsia (no color) | #414141 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #24398F
#24398F
oklch(38.4% 0.144 268.3)
- #554000
#554000
oklch(38.4% 0.078 87.5)
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 #24398F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.039
- Sapphire #2138AB ΔE 0.046
- Twilight Blue #0A437A ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.056
- Light Navy #155084 ΔE 0.068
- Marine Blue #01386A ΔE 0.070
- Dusk Blue #26538D ΔE 0.073
Use #24398F 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.