#24358C
Closest named color: Cobalt (#1E488F). oklch(37.3% 0.145 269.5), rgb(36, 53, 140).
Aa
White text reads best on this color (10.69:1).
About this color
#24358C is a dark, vivid blue. In OKLCH its lightness is 37%, its chroma 0.145 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.050 away. White text reads best on it, at 10.69:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #24358C |
| RGB | rgb(36, 53, 140) |
| HSL | hsl(230, 59%, 35%) |
| OKLCH | oklch(37.3% 0.145 269.5) |
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 #24358C | 10.69:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #24358C | 1.96:1 | Fails | Lc 9.6 | Not readable |
| #24358C text on white | 10.69:1 | AAA | Lc 94.3 | Preferred for body text |
| #24358C text on black | 1.96:1 | Fails | Lc -8.3 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFF
oklch(93.7% 0.03 269.1)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5B7CFF
oklch(63.1% 0.198 269.4)
-
Step 600
600
#405AFE
oklch(55.6% 0.243 269.4)
-
Step 700
700
#3448DD
oklch(49.1% 0.225 269.5)
-
Step 800
800
#2A3DB3
oklch(42.8% 0.187 269.3)
-
Step 900
900 (this color)
#24358C
oklch(37.3% 0.145 269.5)
-
Step 950
950
#152153
oklch(27.1% 0.092 269.2)
#24358C 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) | #00438F | 0.039 |
| Deuteranopia (no green cones) | #00398A | 0.026 |
| Tritanopia (no blue cones) | #004B5B | 0.116 |
| Achromatopsia (no color) | #3E3E3E | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #24358C
#24358C
oklch(37.3% 0.145 269.5)
- #513E00
#513E00
oklch(37.4% 0.076 89.1)
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 #24358C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.050
- Sapphire #2138AB ΔE 0.052
- Twilight Blue #0A437A ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.063
- Marine Blue #01386A ΔE 0.066
- Royal #0C1793 ΔE 0.070
- Light Navy #155084 ΔE 0.076
Use #24358C 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.