#3A63B3
Closest named color: Mid Blue (#276AB3). oklch(51.2% 0.135 262.3), rgb(58, 99, 179).
Aa
White text reads best on this color (5.80:1).
About this color
#3A63B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.135 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.022 away. White text reads best on it, at 5.80:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #3A63B3 |
| RGB | rgb(58, 99, 179) |
| HSL | hsl(220, 51%, 46%) |
| OKLCH | oklch(51.2% 0.135 262.3) |
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 #3A63B3 | 5.80:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #3A63B3 | 3.61:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #3A63B3 text on white | 5.80:1 | AA | Lc 78.8 | Fine for body text |
| #3A63B3 text on black | 3.61:1 | AA large text | Lc -23.0 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#AAC1EC
oklch(80.8% 0.066 262.8)
-
Step 400
400
#7DA0E2
oklch(70.6% 0.105 262.6)
-
Step 500
500
#5C87DA
oklch(63% 0.134 262.5)
-
Step 600
600
#4270C7
oklch(55.7% 0.144 261.9)
-
Step 700
700 (this color)
#3A63B3
oklch(51.2% 0.135 262.3)
-
Step 800
800
#2C4C8B
oklch(42.6% 0.111 262.4)
-
Step 900
900
#27406F
oklch(37.6% 0.087 261.9)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#3A63B3 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) | #3C6BB6 | 0.022 |
| Deuteranopia (no green cones) | #2760B1 | 0.020 |
| Tritanopia (no blue cones) | #007582 | 0.110 |
| Achromatopsia (no color) | #656565 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A63B3
#3A63B3
oklch(51.2% 0.135 262.3)
- #845F00
#845F00
oklch(51.1% 0.105 82)
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 #3A63B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.022
- French Blue #436BAD ΔE 0.029
- Dusky Blue #475F94 ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.054
- Muted Blue #3B719F ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Peacock Blue #016795 ΔE 0.063
Use #3A63B3 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.