#3F60B3
Closest named color: Mid Blue (#276AB3). oklch(50.8% 0.137 265.5), rgb(63, 96, 179).
Aa
White text reads best on this color (5.93:1).
About this color
#3F60B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.137 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 5.93:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #3F60B3 |
| RGB | rgb(63, 96, 179) |
| HSL | hsl(223, 48%, 47%) |
| OKLCH | oklch(50.8% 0.137 265.5) |
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 #3F60B3 | 5.93:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #3F60B3 | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #3F60B3 text on white | 5.93:1 | AA | Lc 79.4 | Fine for body text |
| #3F60B3 text on black | 3.53:1 | AA large text | Lc -22.4 | 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
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC0EC
oklch(80.8% 0.066 265.8)
-
Step 400
400
#819FE3
oklch(70.7% 0.106 265.6)
-
Step 500
500
#6286DB
oklch(63.2% 0.135 265.4)
-
Step 600
600
#496EC9
oklch(55.7% 0.147 265.3)
-
Step 700
700 (this color)
#3F60B3
oklch(50.8% 0.137 265.5)
-
Step 800
800
#314B8D
oklch(42.8% 0.114 265.7)
-
Step 900
900
#2B3F70
oklch(37.7% 0.088 265.7)
-
Step 950
950
#192542
oklch(27% 0.057 265.8)
#3F60B3 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) | #3769B6 | 0.024 |
| Deuteranopia (no green cones) | #225FB1 | 0.027 |
| Tritanopia (no blue cones) | #007381 | 0.114 |
| Achromatopsia (no color) | #646464 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F60B3
#3F60B3
oklch(50.8% 0.137 265.5)
- #806000
#806000
oklch(50.8% 0.104 85.8)
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 #3F60B3, closest first.
No curated palette has a color within ΔE 0.04 of #3F60B3.
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
- Dusky Blue #475F94 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.053
- Iris #6258C4 ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.059
- Muted Blue #3B719F ΔE 0.063
- Windows Blue #3778BF ΔE 0.065
Use #3F60B3 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.