#425ECF
Closest named color: Warm Blue (#4B57DB). oklch(52.5% 0.177 269), rgb(66, 94, 207).
Aa
White text reads best on this color (5.62:1).
About this color
#425ECF is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.177 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.026 away. White text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #425ECF |
| RGB | rgb(66, 94, 207) |
| HSL | hsl(228, 59%, 54%) |
| OKLCH | oklch(52.5% 0.177 269) |
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 #425ECF | 5.62:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #425ECF | 3.73:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #425ECF text on white | 5.62:1 | AA | Lc 77.7 | Fine for body text |
| #425ECF text on black | 3.73:1 | AA large text | Lc -24.1 | 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 600.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABBFF5
oklch(80.9% 0.08 268.8)
-
Step 400
400
#809CF0
oklch(70.7% 0.127 269)
-
Step 500
500
#6281EB
oklch(63.1% 0.163 269.1)
-
Step 600
600 (this color)
#425ECF
oklch(52.5% 0.177 269)
-
Step 700
700
#3C55BD
oklch(49.1% 0.166 269.2)
-
Step 800
800
#314699
oklch(42.6% 0.138 269.1)
-
Step 900
900
#2B3C79
oklch(37.7% 0.106 269.1)
-
Step 950
950
#192447
oklch(27.1% 0.067 268.5)
#425ECF 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) | #006ED3 | 0.049 |
| Deuteranopia (no green cones) | #0061CD | 0.040 |
| Tritanopia (no blue cones) | #00798D | 0.145 |
| Achromatopsia (no color) | #676767 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425ECF
#425ECF
oklch(52.5% 0.177 269)
- #836600
#836600
oklch(52.4% 0.107 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 #425ECF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.026
- Royal Blue #4169E1 ΔE 0.037
- Iris #6258C4 ΔE 0.045
- Neon Blue #4361EE ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.048
- Azul #1D5DEC ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.058
Use #425ECF 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.