#425AB1
Closest named color: Mid Blue (#276AB3). oklch(49.5% 0.141 269.2), rgb(66, 90, 177).
Aa
White text reads best on this color (6.30:1).
About this color
#425AB1 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.141 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.046 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.32:1 |
| White text | 6.30:1 |
Values
| HEX | #425AB1 |
| RGB | rgb(66, 90, 177) |
| HSL | hsl(227, 46%, 48%) |
| OKLCH | oklch(49.5% 0.141 269.2) |
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 #425AB1 | 6.30:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #425AB1 | 3.32:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #425AB1 text on white | 6.30:1 | AA | Lc 81.1 | Fine for body text |
| #425AB1 text on black | 3.32:1 | AA large text | Lc -20.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFBFEE
oklch(80.9% 0.069 270.1)
-
Step 400
400
#859DE5
oklch(70.6% 0.109 269.4)
-
Step 500
500
#6783DD
oklch(63% 0.139 269.1)
-
Step 600
600
#506BCB
oklch(55.6% 0.151 269.2)
-
Step 700
700 (this color)
#425AB1
oklch(49.5% 0.141 269.2)
-
Step 800
800
#35498E
oklch(42.7% 0.116 268.9)
-
Step 900
900
#2E3E71
oklch(37.7% 0.09 268.7)
-
Step 950
950
#1B2442
oklch(26.9% 0.057 269.6)
#425AB1 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) | #2D65B4 | 0.032 |
| Deuteranopia (no green cones) | #165BAF | 0.037 |
| Tritanopia (no blue cones) | #006E7D | 0.120 |
| Achromatopsia (no color) | #606060 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425AB1
#425AB1
oklch(49.5% 0.141 269.2)
- #795E00
#795E00
oklch(49.5% 0.101 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 #425AB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.046
- French Blue #436BAD ΔE 0.049
- Dusky Blue #475F94 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.052
- Iris #6258C4 ΔE 0.054
- Twilight #4E518B ΔE 0.063
- Warm Blue #4B57DB ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
Use #425AB1 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.