#3B577C
Closest named color: YInMn Blue (#415A77). oklch(45.1% 0.07 255.7), rgb(59, 87, 124).
Aa
White text reads best on this color (7.39:1).
About this color
#3B577C is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.070 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.016 away. White text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.84:1 |
| White text | 7.39:1 |
Values
| HEX | #3B577C |
| RGB | rgb(59, 87, 124) |
| HSL | hsl(214, 36%, 36%) |
| OKLCH | oklch(45.1% 0.07 255.7) |
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 #3B577C | 7.39:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #3B577C | 2.84:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #3B577C text on white | 7.39:1 | AAA | Lc 85.6 | Fine for body text |
| #3B577C text on black | 2.84:1 | Fails | Lc -16.4 | 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
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#86A3C9
oklch(70.7% 0.065 255.3)
-
Step 500
500
#678CBC
oklch(63.2% 0.084 255.2)
-
Step 600
600
#4F75A8
oklch(55.6% 0.091 256.1)
-
Step 700
700
#3F6290
oklch(49.1% 0.085 255.7)
-
Step 800
800 (this color)
#3B577C
oklch(45.1% 0.07 255.7)
-
Step 900
900
#2E435E
oklch(37.8% 0.054 255.1)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#3B577C 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) | #48597E | 0.019 |
| Deuteranopia (no green cones) | #41537B | 0.013 |
| Tritanopia (no blue cones) | #1C5F64 | 0.061 |
| Achromatopsia (no color) | #565656 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B577C
#3B577C
oklch(45.1% 0.07 255.7)
- #6C5025
#6C5025
oklch(45.2% 0.07 76)
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 #3B577C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.016
- Light Navy Blue #2E5A88 ΔE 0.022
- Dusk #4E5481 ΔE 0.029
- Dusty Grape #545775 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.036
- Dusk Blue #26538D ΔE 0.039
- Denim #3B638C ΔE 0.039
- Twilight #4E518B ΔE 0.042
Use #3B577C 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.