#425FBB
Closest named color: Mid Blue (#276AB3). oklch(51.3% 0.149 267.7), rgb(66, 95, 187).
Aa
White text reads best on this color (5.85:1).
About this color
#425FBB is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.149 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.039 away. White text reads best on it, at 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #425FBB |
| RGB | rgb(66, 95, 187) |
| HSL | hsl(226, 48%, 50%) |
| OKLCH | oklch(51.3% 0.149 267.7) |
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 #425FBB | 5.85:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #425FBB | 3.58:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #425FBB text on white | 5.85:1 | AA | Lc 79.0 | Fine for body text |
| #425FBB text on black | 3.58:1 | AA large text | Lc -22.8 | 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
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#819EE9
oklch(70.8% 0.115 267.3)
-
Step 500
500
#6383E2
oklch(63% 0.148 268)
-
Step 600
600
#4B6BD0
oklch(55.7% 0.16 267.7)
-
Step 700
700 (this color)
#425FBB
oklch(51.3% 0.149 267.7)
-
Step 800
800
#324992
oklch(42.8% 0.123 267.8)
-
Step 900
900
#2B3E74
oklch(37.8% 0.095 267.2)
-
Step 950
950
#192444
oklch(26.9% 0.062 267.8)
#425FBB 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) | #2E6ABE | 0.031 |
| Deuteranopia (no green cones) | #1060B9 | 0.037 |
| Tritanopia (no blue cones) | #007484 | 0.124 |
| Achromatopsia (no color) | #656565 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425FBB
#425FBB
oklch(51.3% 0.149 267.7)
- #806200
#806200
oklch(51.2% 0.105 87.6)
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 #425FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.039
- French Blue #436BAD ΔE 0.043
- Iris #6258C4 ΔE 0.047
- Warm Blue #4B57DB ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.062
- Slate Blue #6A5ACD ΔE 0.063
Use #425FBB 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.