#3A4F87
Closest named color: Dusk Blue (#26538D). oklch(43.8% 0.096 266.9), rgb(58, 79, 135).
Aa
White text reads best on this color (7.93:1).
About this color
#3A4F87 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.096 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.023 away. White text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #3A4F87 |
| RGB | rgb(58, 79, 135) |
| HSL | hsl(224, 40%, 38%) |
| OKLCH | oklch(43.8% 0.096 266.9) |
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 #3A4F87 | 7.93:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #3A4F87 | 2.64:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #3A4F87 text on white | 7.93:1 | AAA | Lc 87.4 | Fine for body text |
| #3A4F87 text on black | 2.64:1 | Fails | Lc -14.8 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B0C0E6
oklch(80.8% 0.057 267.2)
-
Step 400
400
#879FD9
oklch(70.6% 0.09 266.8)
-
Step 500
500
#6A86CF
oklch(63% 0.115 267.2)
-
Step 600
600
#526FBC
oklch(55.6% 0.125 266.8)
-
Step 700
700
#435CA2
oklch(49% 0.116 267.3)
-
Step 800
800 (this color)
#3A4F87
oklch(43.8% 0.096 266.9)
-
Step 900
900
#2F4069
oklch(37.8% 0.074 265.9)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#3A4F87 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) | #385589 | 0.017 |
| Deuteranopia (no green cones) | #2E4E86 | 0.015 |
| Tritanopia (no blue cones) | #0C5B64 | 0.086 |
| Achromatopsia (no color) | #515151 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4F87
#3A4F87
oklch(43.8% 0.096 266.9)
- #674E00
#674E00
oklch(43.8% 0.09 87.3)
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 #3A4F87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.023
- Twilight #4E518B ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.033
- Light Navy #155084 ΔE 0.035
- Dusk #4E5481 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.036
- Cobalt #1E488F ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.044
Use #3A4F87 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.