#3F607E
Closest named color: YInMn Blue (#415A77). oklch(47.7% 0.062 246.9), rgb(63, 96, 126).
Aa
White text reads best on this color (6.59:1).
About this color
#3F607E is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.062 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.019 away. White text reads best on it, at 6.59:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.18:1 |
| White text | 6.59:1 |
Values
| HEX | #3F607E |
| RGB | rgb(63, 96, 126) |
| HSL | hsl(209, 33%, 37%) |
| OKLCH | oklch(47.7% 0.062 246.9) |
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 #3F607E | 6.59:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3F607E | 3.18:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3F607E text on white | 6.59:1 | AA | Lc 82.5 | Fine for body text |
| #3F607E text on black | 3.18:1 | AA large text | Lc -19.4 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAEF
oklch(93.5% 0.009 247.9)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B2C3D3
oklch(80.9% 0.029 246.5)
-
Step 400
400
#89A4BE
oklch(70.7% 0.049 247.5)
-
Step 500
500
#6B8DAD
oklch(63% 0.062 247.3)
-
Step 600
600
#537799
oklch(55.6% 0.067 247.7)
-
Step 700
700 (this color)
#3F607E
oklch(47.7% 0.062 246.9)
-
Step 800
800
#37526A
oklch(42.7% 0.052 246.2)
-
Step 900
900
#304456
oklch(37.8% 0.04 246.3)
-
Step 950
950
#1C2832
oklch(27% 0.025 244)
#3F607E 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) | #54617F | 0.028 |
| Deuteranopia (no green cones) | #4C5A7D | 0.023 |
| Tritanopia (no blue cones) | #22676A | 0.053 |
| Achromatopsia (no color) | #5D5D5D | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F607E
#3F607E
oklch(47.7% 0.062 246.9)
- #745635
#745635
oklch(47.7% 0.062 68.1)
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 #3F607E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.019
- Denim #3B638C ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.034
- Dusty Grape #545775 ΔE 0.036
- Slate #516572 ΔE 0.036
- Dusky Blue #475F94 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.040
- Dusk #4E5481 ΔE 0.041
Use #3F607E 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.