#425FCC
Closest named color: Warm Blue (#4B57DB). oklch(52.5% 0.172 268.6), rgb(66, 95, 204).
Aa
White text reads best on this color (5.61:1).
About this color
#425FCC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.172 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.031 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.74:1 |
| White text | 5.61:1 |
Values
| HEX | #425FCC |
| RGB | rgb(66, 95, 204) |
| HSL | hsl(227, 58%, 53%) |
| OKLCH | oklch(52.5% 0.172 268.6) |
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 #425FCC | 5.61:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #425FCC | 3.74:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #425FCC text on white | 5.61:1 | AA | Lc 77.7 | Fine for body text |
| #425FCC text on black | 3.74:1 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ACBFF4
oklch(80.9% 0.078 269.3)
-
Step 400
400
#809DEE
oklch(70.8% 0.123 268.2)
-
Step 500
500
#6282E8
oklch(63.1% 0.157 268.5)
-
Step 600
600 (this color)
#425FCC
oklch(52.5% 0.172 268.6)
-
Step 700
700
#3C56BA
oklch(49% 0.16 268.8)
-
Step 800
800
#314796
oklch(42.6% 0.132 268.5)
-
Step 900
900
#2B3D78
oklch(37.8% 0.103 268.4)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#425FCC 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) | #106ED0 | 0.045 |
| Deuteranopia (no green cones) | #0062CA | 0.039 |
| Tritanopia (no blue cones) | #00798C | 0.141 |
| Achromatopsia (no color) | #676767 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425FCC
#425FCC
oklch(52.5% 0.172 268.6)
- #846600
#846600
oklch(52.6% 0.107 88.4)
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 #425FCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.031
- Royal Blue #4169E1 ΔE 0.039
- Iris #6258C4 ΔE 0.044
- Dark Periwinkle #665FD1 ΔE 0.048
- Neon Blue #4361EE ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Mid Blue #276AB3 ΔE 0.056
- Azul #1D5DEC ΔE 0.057
Use #425FCC 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.