#2425D4
Closest named color: Ultramarine Blue (#1805DB). oklch(42.7% 0.25 268.9), rgb(36, 37, 212).
Aa
White text reads best on this color (9.16:1).
About this color
#2425D4 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.250 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Ultramarine Blue (#1805DB), ΔE 0.031 away. White text reads best on it, at 9.16:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.250) |
| Temperature | cool |
| Nearest name | Ultramarine Blue (#1805DB) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #2425D4 |
| RGB | rgb(36, 37, 212) |
| HSL | hsl(240, 71%, 49%) |
| OKLCH | oklch(42.7% 0.25 268.9) |
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 #2425D4 | 9.16:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #2425D4 | 2.29:1 | Fails | Lc 14.6 | Not readable |
| #2425D4 text on white | 9.16:1 | AAA | Lc 89.4 | Fine for body text |
| #2425D4 text on black | 2.29:1 | Fails | Lc -12.8 | 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 800.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600
#3E5AFF
oklch(55.6% 0.244 269)
-
Step 700
700
#2E2FFF
oklch(49.1% 0.287 269)
-
Step 800
800 (this color)
#2425D4
oklch(42.7% 0.25 268.9)
-
Step 900
900
#1E2AA6
oklch(37.8% 0.194 269)
-
Step 950
950
#101B61
oklch(26.9% 0.123 268.9)
#2425D4 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) | #0051D9 | 0.077 |
| Deuteranopia (no green cones) | #003ED1 | 0.038 |
| Tritanopia (no blue cones) | #005E7F | 0.188 |
| Achromatopsia (no color) | #484848 | 0.251 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2425D4
#2425D4
oklch(42.7% 0.25 268.9)
- #624C00
#624C00
oklch(42.8% 0.087 89.5)
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 #2425D4, closest first.
No curated palette has a color within ΔE 0.04 of #2425D4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine Blue #1805DB ΔE 0.031
- Pure Blue #0203E2 ΔE 0.043
- True Blue #010FCC ΔE 0.044
- Blue Blue #2242C7 ΔE 0.050
- Majorelle Blue #3F37C9 ΔE 0.051
- Medium Blue #0000CD ΔE 0.051
- Strong Blue #0C06F7 ΔE 0.059
- Rich Blue #021BF9 ΔE 0.062
Use #2425D4 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.