#3F5979
Closest named color: YInMn Blue (#415A77). oklch(45.7% 0.061 254.1), rgb(63, 89, 121).
Aa
White text reads best on this color (7.20:1).
About this color
#3F5979 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.061 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.006 away. White text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #3F5979 |
| RGB | rgb(63, 89, 121) |
| HSL | hsl(213, 32%, 36%) |
| OKLCH | oklch(45.7% 0.061 254.1) |
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 #3F5979 | 7.20:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #3F5979 | 2.91:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #3F5979 text on white | 7.20:1 | AAA | Lc 84.9 | Fine for body text |
| #3F5979 text on black | 2.91:1 | Fails | Lc -17.1 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B1C2D8
oklch(80.8% 0.036 254.9)
-
Step 400
400
#88A3C4
oklch(70.7% 0.057 253.7)
-
Step 500
500
#6B8CB5
oklch(63.1% 0.073 254.2)
-
Step 600
600
#5276A1
oklch(55.7% 0.079 253.5)
-
Step 700
700
#42638A
oklch(49.2% 0.074 253.3)
-
Step 800
800 (this color)
#3F5979
oklch(45.7% 0.061 254.1)
-
Step 900
900
#30435B
oklch(37.8% 0.048 254.6)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#3F5979 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) | #4D5A7A | 0.019 |
| Deuteranopia (no green cones) | #465578 | 0.014 |
| Tritanopia (no blue cones) | #276064 | 0.054 |
| Achromatopsia (no color) | #575757 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5979
#3F5979
oklch(45.7% 0.061 254.1)
- #6C522F
#6C522F
oklch(45.7% 0.061 73.5)
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 #3F5979, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.006
- Dusty Grape #545775 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusk #4E5481 ΔE 0.030
- Denim #3B638C ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.046
- Twilight #4E518B ΔE 0.047
Use #3F5979 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.