#3F679B
Closest named color: Dusky Blue (#475F94). oklch(50.8% 0.095 255.6), rgb(63, 103, 155).
Aa
White text reads best on this color (5.79:1).
About this color
#3F679B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.095 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.024 away. White text reads best on it, at 5.79:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.62:1 |
| White text | 5.79:1 |
Values
| HEX | #3F679B |
| RGB | rgb(63, 103, 155) |
| HSL | hsl(214, 42%, 43%) |
| OKLCH | oklch(50.8% 0.095 255.6) |
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 #3F679B | 5.79:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #3F679B | 3.62:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #3F679B text on white | 5.79:1 | AA | Lc 78.8 | Fine for body text |
| #3F679B text on black | 3.62:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ADC3DF
oklch(81% 0.046 254.5)
-
Step 400
400
#82A3CE
oklch(70.7% 0.073 255.2)
-
Step 500
500
#628CC2
oklch(63.2% 0.094 255.1)
-
Step 600
600
#4975AE
oklch(55.6% 0.102 255.5)
-
Step 700
700 (this color)
#3F679B
oklch(50.8% 0.095 255.6)
-
Step 800
800
#305079
oklch(42.6% 0.078 255.2)
-
Step 900
900
#2B4362
oklch(37.8% 0.061 255.3)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#3F679B 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) | #516A9D | 0.024 |
| Deuteranopia (no green cones) | #45619A | 0.017 |
| Tritanopia (no blue cones) | #00737A | 0.082 |
| Achromatopsia (no color) | #656565 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F679B
#3F679B
oklch(50.8% 0.095 255.6)
- #855D1B
#855D1B
oklch(50.9% 0.095 75.4)
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 #3F679B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.024
- Denim #3B638C ΔE 0.026
- Muted Blue #3B719F ΔE 0.028
- French Blue #436BAD ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.036
- Peacock Blue #016795 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.040
Use #3F679B 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.