#3D688A
Closest named color: Denim (#3B638C). oklch(50.1% 0.073 243.8), rgb(61, 104, 138).
Aa
White text reads best on this color (5.92:1).
About this color
#3D688A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.073 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.017 away. White text reads best on it, at 5.92:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #3D688A |
| RGB | rgb(61, 104, 138) |
| HSL | hsl(206, 39%, 39%) |
| OKLCH | oklch(50.1% 0.073 243.8) |
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 #3D688A | 5.92:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #3D688A | 3.54:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #3D688A text on white | 5.92:1 | AA | Lc 79.5 | Fine for body text |
| #3D688A text on black | 3.54:1 | AA large text | Lc -22.3 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE5
oklch(88.5% 0.019 243)
-
Step 300
300
#AEC4D6
oklch(80.9% 0.035 242.8)
-
Step 400
400
#83A5C2
oklch(70.7% 0.057 244.5)
-
Step 500
500
#638FB2
oklch(63.2% 0.072 243.2)
-
Step 600
600
#49789E
oklch(55.5% 0.079 244.3)
-
Step 700
700 (this color)
#3D688A
oklch(50.1% 0.073 243.8)
-
Step 800
800
#31536E
oklch(42.8% 0.06 243.8)
-
Step 900
900
#2B4459
oklch(37.6% 0.048 244.9)
-
Step 950
950
#1A2834
oklch(27% 0.03 245.1)
#3D688A 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) | #59688C | 0.035 |
| Deuteranopia (no green cones) | #4F6089 | 0.029 |
| Tritanopia (no blue cones) | #087074 | 0.060 |
| Achromatopsia (no color) | #646464 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D688A
#3D688A
oklch(50.1% 0.073 243.8)
- #815A35
#815A35
oklch(50.1% 0.073 63.3)
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 #3D688A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.017
- Dusky Blue #475F94 ΔE 0.036
- Muted Blue #3B719F ΔE 0.037
- Peacock Blue #016795 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.041
- Ocean Blue #03719C ΔE 0.041
- Slate #516572 ΔE 0.042
- Sea Blue #047495 ΔE 0.042
Use #3D688A 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.