#3A4A8D
Closest named color: Dusk Blue (#26538D). oklch(43.1% 0.112 271), rgb(58, 74, 141).
Aa
White text reads best on this color (8.25:1).
About this color
#3A4A8D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.112 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.031 away. White text reads best on it, at 8.25:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.54:1 |
| White text | 8.25:1 |
Values
| HEX | #3A4A8D |
| RGB | rgb(58, 74, 141) |
| HSL | hsl(228, 42%, 39%) |
| OKLCH | oklch(43.1% 0.112 271) |
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 #3A4A8D | 8.25:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #3A4A8D | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #3A4A8D text on white | 8.25:1 | AAA | Lc 88.3 | Fine for body text |
| #3A4A8D text on black | 2.54:1 | Fails | Lc -13.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F2
oklch(88.4% 0.037 272)
-
Step 300
300
#B1BFEC
oklch(80.9% 0.066 271.4)
-
Step 400
400
#889DE2
oklch(70.7% 0.104 270.6)
-
Step 500
500
#6C83DA
oklch(63.1% 0.134 271)
-
Step 600
600
#556BC8
oklch(55.7% 0.146 271)
-
Step 700
700
#4559AC
oklch(49.1% 0.134 270.6)
-
Step 800
800 (this color)
#3A4A8D
oklch(43.1% 0.112 271)
-
Step 900
900
#313D70
oklch(37.6% 0.088 271.6)
-
Step 950
950
#1C2441
oklch(26.9% 0.055 270.7)
#3A4A8D 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) | #2B528F | 0.026 |
| Deuteranopia (no green cones) | #1F4B8C | 0.029 |
| Tritanopia (no blue cones) | #015964 | 0.101 |
| Achromatopsia (no color) | #4F4F4F | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4A8D
#3A4A8D
oklch(43.1% 0.112 271)
- #624E00
#624E00
oklch(43.2% 0.088 91.8)
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 #3A4A8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.031
- Cobalt #1E488F ΔE 0.032
- Blueberry #464196 ΔE 0.033
- Twilight #4E518B ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.038
- Light Navy #155084 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.049
Use #3A4A8D 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.