#3B557D
Closest named color: YInMn Blue (#415A77). oklch(44.7% 0.073 258.8), rgb(59, 85, 125).
Aa
White text reads best on this color (7.54:1).
About this color
#3B557D is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.073 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.022 away. White text reads best on it, at 7.54:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #3B557D |
| RGB | rgb(59, 85, 125) |
| HSL | hsl(216, 36%, 36%) |
| OKLCH | oklch(44.7% 0.073 258.8) |
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 #3B557D | 7.54:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #3B557D | 2.78:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #3B557D text on white | 7.54:1 | AAA | Lc 86.1 | Fine for body text |
| #3B557D text on black | 2.78:1 | Fails | Lc -15.9 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B0C2DD
oklch(80.9% 0.043 258.4)
-
Step 400
400
#87A2CC
oklch(70.7% 0.069 259.1)
-
Step 500
500
#698BBF
oklch(63.2% 0.088 258.7)
-
Step 600
600
#5074AB
oklch(55.6% 0.095 258.6)
-
Step 700
700
#416193
oklch(49.1% 0.089 259)
-
Step 800
800 (this color)
#3B557D
oklch(44.7% 0.073 258.8)
-
Step 900
900
#2F4260
oklch(37.7% 0.057 259.3)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#3B557D 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) | #45587F | 0.017 |
| Deuteranopia (no green cones) | #3E517C | 0.012 |
| Tritanopia (no blue cones) | #1B5E63 | 0.066 |
| Achromatopsia (no color) | #545454 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B557D
#3B557D
oklch(44.7% 0.073 258.8)
- #6A4F20
#6A4F20
oklch(44.6% 0.073 78.7)
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 #3B557D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.023
- Dusk #4E5481 ΔE 0.027
- Dusk Blue #26538D ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.035
- Dusty Grape #545775 ΔE 0.038
- Twilight #4E518B ΔE 0.039
- Light Navy #155084 ΔE 0.042
Use #3B557D 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.