#3D647B
Closest named color: Slate (#516572). oklch(48.4% 0.058 235.6), rgb(61, 100, 123).
Aa
White text reads best on this color (6.34:1).
About this color
#3D647B is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.058 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 6.34:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.30:1 |
| White text | 6.34:1 |
Values
| HEX | #3D647B |
| RGB | rgb(61, 100, 123) |
| HSL | hsl(202, 34%, 36%) |
| OKLCH | oklch(48.4% 0.058 235.6) |
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 #3D647B | 6.34:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #3D647B | 3.30:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #3D647B text on white | 6.34:1 | AA | Lc 81.5 | Fine for body text |
| #3D647B text on black | 3.30:1 | AA large text | Lc -20.4 | 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
#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
#688FA8
oklch(63.1% 0.057 237)
-
Step 600
600
#4E7993
oklch(55.5% 0.063 236)
-
Step 700
700 (this color)
#3D647B
oklch(48.4% 0.058 235.6)
-
Step 800
800
#345366
oklch(42.6% 0.048 236.4)
-
Step 900
900
#2E4553
oklch(37.7% 0.037 235.8)
-
Step 950
950
#1B2830
oklch(26.9% 0.023 235.8)
#3D647B 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) | #59637C | 0.036 |
| Deuteranopia (no green cones) | #515C7B | 0.033 |
| Tritanopia (no blue cones) | #1F6A6C | 0.044 |
| Achromatopsia (no color) | #5F5F5F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D647B
#3D647B
oklch(48.4% 0.058 235.6)
- #78563F
#78563F
oklch(48.3% 0.057 55)
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 #3D647B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Denim #3B638C ΔE 0.029
- YInMn Blue #415A77 ΔE 0.029
- Dusty Grape #545775 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.049
- Peacock Blue #016795 ΔE 0.050
- Dark Aqua #05696B ΔE 0.051
Use #3D647B 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.