#3D638D
Closest named color: Denim (#3B638C). oklch(49% 0.081 252), rgb(61, 99, 141).
Aa
White text reads best on this color (6.23:1).
About this color
#3D638D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.081 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.003 away. White text reads best on it, at 6.23:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.36:1 |
| White text | 6.23:1 |
Values
| HEX | #3D638D |
| RGB | rgb(61, 99, 141) |
| HSL | hsl(212, 40%, 40%) |
| OKLCH | oklch(49% 0.081 252) |
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 #3D638D | 6.23:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #3D638D | 3.36:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #3D638D text on white | 6.23:1 | AA | Lc 80.9 | Fine for body text |
| #3D638D text on black | 3.36:1 | AA large text | Lc -20.9 | 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
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#85A4C7
oklch(70.8% 0.062 251.8)
-
Step 500
500
#668DB9
oklch(63.2% 0.08 252.1)
-
Step 600
600
#4C76A5
oklch(55.5% 0.087 252.2)
-
Step 700
700 (this color)
#3D638D
oklch(49% 0.081 252)
-
Step 800
800
#335173
oklch(42.7% 0.067 252.5)
-
Step 900
900
#2D435D
oklch(37.7% 0.053 253.2)
-
Step 950
950
#1A2736
oklch(26.8% 0.033 252.6)
#3D638D 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) | #52658F | 0.027 |
| Deuteranopia (no green cones) | #475D8C | 0.020 |
| Tritanopia (no blue cones) | #056D72 | 0.071 |
| Achromatopsia (no color) | #616161 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D638D
#3D638D
oklch(49% 0.081 252)
- #7D5828
#7D5828
oklch(49% 0.081 71)
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 #3D638D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.003
- Dusky Blue #475F94 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.033
- Peacock Blue #016795 ΔE 0.035
- YInMn Blue #415A77 ΔE 0.039
- Muted Blue #3B719F ΔE 0.044
- Dusk #4E5481 ΔE 0.046
Use #3D638D 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.