#3F6489
Closest named color: Denim (#3B638C). oklch(49.2% 0.073 249.5), rgb(63, 100, 137).
Aa
White text reads best on this color (6.18:1).
About this color
#3F6489 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.073 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.008 away. White text reads best on it, at 6.18:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #3F6489 |
| RGB | rgb(63, 100, 137) |
| HSL | hsl(210, 37%, 39%) |
| OKLCH | oklch(49.2% 0.073 249.5) |
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 #3F6489 | 6.18:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #3F6489 | 3.39:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #3F6489 text on white | 6.18:1 | AA | Lc 80.7 | Fine for body text |
| #3F6489 text on black | 3.39:1 | AA large text | Lc -21.1 | 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 700.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B0C3D7
oklch(80.9% 0.035 249.6)
-
Step 400
400
#86A4C3
oklch(70.7% 0.056 249.5)
-
Step 500
500
#678DB4
oklch(63% 0.073 249.7)
-
Step 600
600
#4E77A0
oklch(55.6% 0.079 249.4)
-
Step 700
700 (this color)
#3F6489
oklch(49.2% 0.073 249.5)
-
Step 800
800
#34526F
oklch(42.8% 0.06 248.6)
-
Step 900
900
#2E445A
oklch(37.8% 0.047 249.2)
-
Step 950
950
#1B2835
oklch(27.1% 0.03 249)
#3F6489 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) | #55658B | 0.028 |
| Deuteranopia (no green cones) | #4B5E88 | 0.021 |
| Tritanopia (no blue cones) | #166D71 | 0.063 |
| Achromatopsia (no color) | #616161 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6489
#3F6489
oklch(49.2% 0.073 249.5)
- #7C5930
#7C5930
oklch(49.2% 0.073 69)
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 #3F6489, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.008
- Dusky Blue #475F94 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.034
- YInMn Blue #415A77 ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.037
- Peacock Blue #016795 ΔE 0.039
- Slate #516572 ΔE 0.043
- Muted Blue #3B719F ΔE 0.045
Use #3F6489 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.