#3D688F
Closest named color: Denim (#3B638C). oklch(50.3% 0.079 247.4), rgb(61, 104, 143).
Aa
White text reads best on this color (5.87:1).
About this color
#3D688F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.079 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.015 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #3D688F |
| RGB | rgb(61, 104, 143) |
| HSL | hsl(209, 40%, 40%) |
| OKLCH | oklch(50.3% 0.079 247.4) |
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 #3D688F | 5.87:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #3D688F | 3.57:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #3D688F text on white | 5.87:1 | AA | Lc 79.2 | Fine for body text |
| #3D688F text on black | 3.57:1 | AA large text | Lc -22.6 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE7
oklch(88.5% 0.022 245.9)
-
Step 300
300
#AEC3D9
oklch(80.8% 0.039 249.5)
-
Step 400
400
#82A5C5
oklch(70.7% 0.061 246.4)
-
Step 500
500
#628EB7
oklch(63.1% 0.079 247.4)
-
Step 600
600
#4878A3
oklch(55.7% 0.085 247)
-
Step 700
700 (this color)
#3D688F
oklch(50.3% 0.079 247.4)
-
Step 800
800
#305271
oklch(42.7% 0.065 247.4)
-
Step 900
900
#2B445B
oklch(37.7% 0.05 247.3)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#3D688F 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) | #586991 | 0.033 |
| Deuteranopia (no green cones) | #4D618E | 0.026 |
| Tritanopia (no blue cones) | #007175 | 0.067 |
| Achromatopsia (no color) | #646464 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D688F
#3D688F
oklch(50.3% 0.079 247.4)
- #825B2F
#825B2F
oklch(50.3% 0.079 67.6)
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 #3D688F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.015
- Dusky Blue #475F94 ΔE 0.031
- Muted Blue #3B719F ΔE 0.032
- Peacock Blue #016795 ΔE 0.036
- Ocean Blue #03719C ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.042
- Sea Blue #047495 ΔE 0.042
Use #3D688F 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.