#3A577B
Closest named color: YInMn Blue (#415A77). oklch(45% 0.069 254.4), rgb(58, 87, 123).
Aa
White text reads best on this color (7.42:1).
About this color
#3A577B is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.069 and its hue 254°. 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 7.42:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #3A577B |
| RGB | rgb(58, 87, 123) |
| HSL | hsl(213, 36%, 35%) |
| OKLCH | oklch(45% 0.069 254.4) |
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 #3A577B | 7.42:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #3A577B | 2.82:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3A577B text on white | 7.42:1 | AAA | Lc 85.7 | Fine for body text |
| #3A577B text on black | 2.82:1 | Fails | Lc -16.3 | 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 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
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC3DB
oklch(81% 0.04 253.1)
-
Step 400
400
#85A3C9
oklch(70.7% 0.065 254.6)
-
Step 500
500
#678CBB
oklch(63.1% 0.083 254.8)
-
Step 600
600
#4E75A7
oklch(55.5% 0.09 255.1)
-
Step 700
700
#3E628F
oklch(49% 0.084 254.7)
-
Step 800
800 (this color)
#3A577B
oklch(45% 0.069 254.4)
-
Step 900
900
#2D435E
oklch(37.7% 0.054 254.1)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#3A577B 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) | #49597D | 0.021 |
| Deuteranopia (no green cones) | #41527A | 0.016 |
| Tritanopia (no blue cones) | #1A5F64 | 0.060 |
| Achromatopsia (no color) | #555555 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A577B
#3A577B
oklch(45% 0.069 254.4)
- #6C4F26
#6C4F26
oklch(44.9% 0.069 73.9)
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 #3A577B, 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 0.023
- Dusk #4E5481 ΔE 0.030
- Dusty Grape #545775 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.038
- Dusk Blue #26538D ΔE 0.040
- Denim #3B638C ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.044
Use #3A577B 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.