#3A507E
Closest named color: Dusk Blue (#26538D). oklch(43.5% 0.081 263.9), rgb(58, 80, 126).
Aa
White text reads best on this color (7.98:1).
About this color
#3A507E is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.081 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.98:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.62:1 |
| White text | 7.98:1 |
Values
| HEX | #3A507E |
| RGB | rgb(58, 80, 126) |
| HSL | hsl(221, 37%, 36%) |
| OKLCH | oklch(43.5% 0.081 263.9) |
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 #3A507E | 7.98:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #3A507E | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #3A507E text on white | 7.98:1 | AAA | Lc 87.6 | Fine for body text |
| #3A507E text on black | 2.62:1 | Fails | Lc -14.6 | Not readable |
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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0D9EB
oklch(88.4% 0.027 264.4)
-
Step 300
300
#B1C1E0
oklch(80.9% 0.047 263.7)
-
Step 400
400
#89A1D1
oklch(70.8% 0.076 263.9)
-
Step 500
500
#6B89C5
oklch(63.2% 0.097 263.5)
-
Step 600
600
#5372B1
oklch(55.7% 0.105 263.5)
-
Step 700
700
#445F98
oklch(49.1% 0.097 264)
-
Step 800
800 (this color)
#3A507E
oklch(43.5% 0.081 263.9)
-
Step 900
900
#304163
oklch(37.7% 0.063 263.4)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#3A507E 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) | #3E5480 | 0.014 |
| Deuteranopia (no green cones) | #364E7D | 0.008 |
| Tritanopia (no blue cones) | #195A61 | 0.073 |
| Achromatopsia (no color) | #515151 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A507E
#3A507E
oklch(43.5% 0.081 263.9)
- #664D11
#664D11
oklch(43.6% 0.081 84.4)
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 #3A507E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.031
- Dusk #4E5481 ΔE 0.032
- Light Navy #155084 ΔE 0.035
- Twilight #4E518B ΔE 0.036
- YInMn Blue #415A77 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.042
Use #3A507E 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.