#425BD4
Closest named color: Warm Blue (#4B57DB). oklch(52.3% 0.188 269.8), rgb(66, 91, 212).
Aa
White text reads best on this color (5.70:1).
About this color
#425BD4 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.188 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.017 away. White text reads best on it, at 5.70:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.67:1 |
| White text | 5.70:1 |
Values
| HEX | #425BD4 |
| RGB | rgb(66, 91, 212) |
| HSL | hsl(230, 63%, 55%) |
| OKLCH | oklch(52.3% 0.188 269.8) |
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 #425BD4 | 5.70:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #425BD4 | 3.67:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #425BD4 text on white | 5.70:1 | AA | Lc 78.1 | Fine for body text |
| #425BD4 text on black | 3.67:1 | AA large text | Lc -23.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400
#7D9AFB
oklch(70.7% 0.146 269.8)
-
Step 500
500
#5F7DF8
oklch(63% 0.186 270)
-
Step 600
600
#4863E7
oklch(55.6% 0.201 269.8)
-
Step 700
700 (this color)
#425BD4
oklch(52.3% 0.188 269.8)
-
Step 800
800
#3043A2
oklch(42.7% 0.155 270)
-
Step 900
900
#293A81
oklch(37.7% 0.121 269.6)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#425BD4 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) | #006DD8 | 0.051 |
| Deuteranopia (no green cones) | #0060D2 | 0.040 |
| Tritanopia (no blue cones) | #00798F | 0.152 |
| Achromatopsia (no color) | #666666 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425BD4
#425BD4
oklch(52.3% 0.188 269.8)
- #826600
#826600
oklch(52.3% 0.107 89.8)
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 #425BD4, closest first.
No curated palette has a color within ΔE 0.04 of #425BD4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.017
- Royal Blue #4169E1 ΔE 0.038
- Neon Blue #4361EE ΔE 0.042
- Azul #1D5DEC ΔE 0.046
- Iris #6258C4 ΔE 0.049
- Dark Periwinkle #665FD1 ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.060
Use #425BD4 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.