#3F677E
Closest named color: Slate (#516572). oklch(49.4% 0.058 234.9), rgb(63, 103, 126).
Aa
White text reads best on this color (6.08:1).
About this color
#3F677E is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.058 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.026 away. White text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.45:1 |
| White text | 6.08:1 |
Values
| HEX | #3F677E |
| RGB | rgb(63, 103, 126) |
| HSL | hsl(202, 33%, 37%) |
| OKLCH | oklch(49.4% 0.058 234.9) |
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 #3F677E | 6.08:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #3F677E | 3.45:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #3F677E text on white | 6.08:1 | AA | Lc 80.3 | Fine for body text |
| #3F677E text on black | 3.45:1 | AA large text | Lc -21.6 | 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
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D0
oklch(80.9% 0.028 234.1)
-
Step 400
400
#86A6B9
oklch(70.8% 0.045 234.3)
-
Step 500
500
#6790A8
oklch(63.2% 0.058 234.6)
-
Step 600
600
#4E7993
oklch(55.5% 0.063 236)
-
Step 700
700 (this color)
#3F677E
oklch(49.4% 0.058 234.9)
-
Step 800
800
#345366
oklch(42.6% 0.048 236.4)
-
Step 900
900
#2D4553
oklch(37.7% 0.038 234.8)
-
Step 950
950
#1B2830
oklch(26.9% 0.023 235.8)
#3F677E 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) | #5C667F | 0.037 |
| Deuteranopia (no green cones) | #535F7E | 0.033 |
| Tritanopia (no blue cones) | #206D6E | 0.045 |
| Achromatopsia (no color) | #626262 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F677E
#3F677E
oklch(49.4% 0.058 234.9)
- #7C5941
#7C5941
oklch(49.5% 0.059 55.4)
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 #3F677E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.026
- Denim #3B638C ΔE 0.029
- YInMn Blue #415A77 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.046
- Dusky Blue #475F94 ΔE 0.049
- Peacock Blue #016795 ΔE 0.050
- Dusty Grape #545775 ΔE 0.050
- Sea Blue #047495 ΔE 0.051
Use #3F677E 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.