#4263BF
Closest named color: Mid Blue (#276AB3). oklch(52.4% 0.149 266.5), rgb(66, 99, 191).
Aa
White text reads best on this color (5.57:1).
About this color
#4263BF is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.149 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.036 away. White text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #4263BF |
| RGB | rgb(66, 99, 191) |
| HSL | hsl(224, 49%, 50%) |
| OKLCH | oklch(52.4% 0.149 266.5) |
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 #4263BF | 5.57:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #4263BF | 3.76:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #4263BF text on white | 5.57:1 | AA | Lc 77.5 | Fine for body text |
| #4263BF text on black | 3.76:1 | AA large text | Lc -24.2 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#ADC0ED
oklch(80.9% 0.067 267)
-
Step 400
400
#829FE4
oklch(70.8% 0.107 266.3)
-
Step 500
500
#6385DC
oklch(63.1% 0.137 266.4)
-
Step 600
600 (this color)
#4263BF
oklch(52.4% 0.149 266.5)
-
Step 700
700
#3C5AAF
oklch(49% 0.14 266.6)
-
Step 800
800
#324A8D
oklch(42.6% 0.115 266.7)
-
Step 900
900
#2B3F71
oklch(37.8% 0.089 265.9)
-
Step 950
950
#1A2542
oklch(27% 0.056 266.9)
#4263BF 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) | #336EC2 | 0.030 |
| Deuteranopia (no green cones) | #1763BD | 0.034 |
| Tritanopia (no blue cones) | #007888 | 0.123 |
| Achromatopsia (no color) | #686868 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4263BF
#4263BF
oklch(52.4% 0.149 266.5)
- #856500
#856500
oklch(52.5% 0.107 86.8)
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 #4263BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.036
- French Blue #436BAD ΔE 0.039
- Iris #6258C4 ΔE 0.048
- Royal Blue #4169E1 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.056
- Windows Blue #3778BF ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.061
Use #4263BF 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.