#3F5FA0
Closest named color: Dusky Blue (#475F94). oklch(49.3% 0.111 263.1), rgb(63, 95, 160).
Aa
White text reads best on this color (6.25:1).
About this color
#3F5FA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.111 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.021 away. White text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #3F5FA0 |
| RGB | rgb(63, 95, 160) |
| HSL | hsl(220, 43%, 44%) |
| OKLCH | oklch(49.3% 0.111 263.1) |
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 #3F5FA0 | 6.25:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #3F5FA0 | 3.35:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #3F5FA0 text on white | 6.25:1 | AA | Lc 81.0 | Fine for body text |
| #3F5FA0 text on black | 3.35:1 | AA large text | Lc -20.9 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAEE
oklch(88.6% 0.03 262.5)
-
Step 300
300
#AFC1E4
oklch(80.9% 0.053 263.7)
-
Step 400
400
#84A1D7
oklch(70.8% 0.086 262.5)
-
Step 500
500
#6688CC
oklch(63% 0.11 263.3)
-
Step 600
600
#4D71B9
oklch(55.6% 0.12 263)
-
Step 700
700 (this color)
#3F5FA0
oklch(49.3% 0.111 263.1)
-
Step 800
800
#344D81
oklch(42.6% 0.092 263.6)
-
Step 900
900
#2D4168
oklch(37.8% 0.072 262.8)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#3F5FA0 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) | #4365A3 | 0.018 |
| Deuteranopia (no green cones) | #365C9F | 0.014 |
| Tritanopia (no blue cones) | #006E78 | 0.097 |
| Achromatopsia (no color) | #606060 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5FA0
#3F5FA0
oklch(49.3% 0.111 263.1)
- #7D5B00
#7D5B00
oklch(49.4% 0.101 83.2)
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 #3F5FA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.025
- Denim #3B638C ΔE 0.037
- French Blue #436BAD ΔE 0.038
- Mid Blue #276AB3 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.045
- Twilight #4E518B ΔE 0.048
- Peacock Blue #016795 ΔE 0.048
Use #3F5FA0 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.