#4063BB
Closest named color: Mid Blue (#276AB3). oklch(52% 0.144 265.4), rgb(64, 99, 187).
Aa
White text reads best on this color (5.64:1).
About this color
#4063BB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.144 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 5.64:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.72:1 |
| White text | 5.64:1 |
Values
| HEX | #4063BB |
| RGB | rgb(64, 99, 187) |
| HSL | hsl(223, 49%, 49%) |
| OKLCH | oklch(52% 0.144 265.4) |
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 #4063BB | 5.64:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #4063BB | 3.72:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #4063BB text on white | 5.64:1 | AA | Lc 77.9 | Fine for body text |
| #4063BB text on black | 3.72:1 | AA large text | Lc -23.8 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ABC0EF
oklch(80.8% 0.071 266)
-
Step 400
400
#7F9FE7
oklch(70.8% 0.112 265.4)
-
Step 500
500
#5F85DF
oklch(63.1% 0.142 265.3)
-
Step 600
600
#476DCD
oklch(55.7% 0.155 265.4)
-
Step 700
700 (this color)
#4063BB
oklch(52% 0.144 265.4)
-
Step 800
800
#2F4A90
oklch(42.7% 0.12 265.7)
-
Step 900
900
#293F73
oklch(37.8% 0.093 265)
-
Step 950
950
#182543
oklch(27% 0.059 265)
#4063BB 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) | #366DBE | 0.027 |
| Deuteranopia (no green cones) | #1E62B9 | 0.029 |
| Tritanopia (no blue cones) | #007786 | 0.119 |
| Achromatopsia (no color) | #676767 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4063BB
#4063BB
oklch(52% 0.144 265.4)
- #856300
#856300
oklch(52% 0.107 85)
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 #4063BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- French Blue #436BAD ΔE 0.034
- Iris #6258C4 ΔE 0.052
- Windows Blue #3778BF ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.060
- Dusky Blue #475F94 ΔE 0.061
Use #4063BB 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.