#3A4889
Closest named color: Cobalt (#1E488F). oklch(42.4% 0.109 271.9), rgb(58, 72, 137).
Aa
White text reads best on this color (8.50:1).
About this color
#3A4889 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.109 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.032 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #3A4889 |
| RGB | rgb(58, 72, 137) |
| HSL | hsl(229, 41%, 38%) |
| OKLCH | oklch(42.4% 0.109 271.9) |
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 #3A4889 | 8.50:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #3A4889 | 2.46:1 | Fails | Lc 14.9 | Not readable |
| #3A4889 text on white | 8.50:1 | AAA | Lc 89.1 | Fine for body text |
| #3A4889 text on black | 2.46:1 | Fails | Lc -13.1 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B2BFEB
oklch(81% 0.064 272)
-
Step 400
400
#8A9DE0
oklch(70.7% 0.101 271.5)
-
Step 500
500
#6E83D8
oklch(63.1% 0.13 271.7)
-
Step 600
600
#576BC5
oklch(55.6% 0.141 271.7)
-
Step 700
700
#4859AA
oklch(49.2% 0.13 271.9)
-
Step 800
800 (this color)
#3A4889
oklch(42.4% 0.109 271.9)
-
Step 900
900
#323D6E
oklch(37.6% 0.085 272.2)
-
Step 950
950
#1D2441
oklch(26.9% 0.055 272)
#3A4889 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) | #2A508B | 0.027 |
| Deuteranopia (no green cones) | #204988 | 0.029 |
| Tritanopia (no blue cones) | #0B5662 | 0.096 |
| Achromatopsia (no color) | #4D4D4D | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4889
#3A4889
oklch(42.4% 0.109 271.9)
- #5F4C00
#5F4C00
oklch(42.4% 0.087 92.3)
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 #3A4889, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.032
- Blueberry #464196 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.034
- Dusk Blue #26538D ΔE 0.035
- Twilight #4E518B ΔE 0.041
- Light Navy #155084 ΔE 0.041
- Dusk #4E5481 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.053
Use #3A4889 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.