#3D556A
Closest named color: YInMn Blue (#415A77). oklch(43.9% 0.045 245.5), rgb(61, 85, 106).
Aa
White text reads best on this color (7.76:1).
About this color
#3D556A is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.045 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.025 away. White text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #3D556A |
| RGB | rgb(61, 85, 106) |
| HSL | hsl(208, 27%, 33%) |
| OKLCH | oklch(43.9% 0.045 245.5) |
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 #3D556A | 7.76:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #3D556A | 2.70:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #3D556A text on white | 7.76:1 | AAA | Lc 86.9 | Fine for body text |
| #3D556A text on black | 2.70:1 | Fails | Lc -15.2 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE2
oklch(88.4% 0.015 244.7)
-
Step 300
300
#B3C3D1
oklch(80.9% 0.026 244.5)
-
Step 400
400
#8BA4BA
oklch(70.7% 0.043 245)
-
Step 500
500
#6E8DA9
oklch(63% 0.055 246.1)
-
Step 600
600
#567794
oklch(55.6% 0.059 245.7)
-
Step 700
700
#46647E
oklch(49.1% 0.055 245.4)
-
Step 800
800 (this color)
#3D556A
oklch(43.9% 0.045 245.5)
-
Step 900
900
#324453
oklch(37.8% 0.035 244)
-
Step 950
950
#1D2831
oklch(27.1% 0.023 243.4)
#3D556A 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) | #4C556B | 0.021 |
| Deuteranopia (no green cones) | #47506A | 0.019 |
| Tritanopia (no blue cones) | #2D5A5C | 0.038 |
| Achromatopsia (no color) | #525252 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D556A
#3D556A
oklch(43.9% 0.045 245.5)
- #644D37
#644D37
oklch(43.8% 0.046 64.9)
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 #3D556A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.025
- Dusty Grape #545775 ΔE 0.039
- Dusk #4E5481 ΔE 0.048
- Petrol #005F6A ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.051
- Deep Teal #00555A ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.058
Use #3D556A 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.