#425EBB
Closest named color: Mid Blue (#276AB3). oklch(51.1% 0.15 268.1), rgb(66, 94, 187).
Aa
White text reads best on this color (5.91:1).
About this color
#425EBB is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.150 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.041 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.55:1 |
| White text | 5.91:1 |
Values
| HEX | #425EBB |
| RGB | rgb(66, 94, 187) |
| HSL | hsl(226, 48%, 50%) |
| OKLCH | oklch(51.1% 0.15 268.1) |
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 #425EBB | 5.91:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #425EBB | 3.55:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #425EBB text on white | 5.91:1 | AA | Lc 79.3 | Fine for body text |
| #425EBB text on black | 3.55:1 | AA large text | Lc -22.5 | 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
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADC0F0
oklch(81% 0.071 267.9)
-
Step 400
400
#829DE9
oklch(70.6% 0.116 268.4)
-
Step 500
500
#6383E3
oklch(63.1% 0.149 268.1)
-
Step 600
600
#4B6AD0
oklch(55.5% 0.161 268.1)
-
Step 700
700 (this color)
#425EBB
oklch(51.1% 0.15 268.1)
-
Step 800
800
#324992
oklch(42.8% 0.123 267.8)
-
Step 900
900
#2C3D74
oklch(37.6% 0.096 268.5)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#425EBB 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) | #2B6ABE | 0.034 |
| Deuteranopia (no green cones) | #0A5FB9 | 0.039 |
| Tritanopia (no blue cones) | #007483 | 0.127 |
| Achromatopsia (no color) | #646464 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425EBB
#425EBB
oklch(51.1% 0.15 268.1)
- #7F6200
#7F6200
oklch(51.1% 0.104 88.3)
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 #425EBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.041
- French Blue #436BAD ΔE 0.045
- Iris #6258C4 ΔE 0.047
- Warm Blue #4B57DB ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.062
- Royal Blue #4169E1 ΔE 0.063
- Dusky Blue #475F94 ΔE 0.063
Use #425EBB 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.