#34428F
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.128 271.9), rgb(52, 66, 143).
Aa
White text reads best on this color (9.04:1).
About this color
#34428F is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.128 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 9.04:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #34428F |
| RGB | rgb(52, 66, 143) |
| HSL | hsl(231, 47%, 38%) |
| OKLCH | oklch(41.2% 0.128 271.9) |
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 #34428F | 9.04:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #34428F | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #34428F text on white | 9.04:1 | AAA | Lc 90.5 | Preferred for body text |
| #34428F text on black | 2.32:1 | Fails | Lc -11.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AFBEF2
oklch(80.8% 0.076 272.1)
-
Step 400
400
#869BEB
oklch(70.6% 0.12 271.8)
-
Step 500
500
#6A80E5
oklch(63% 0.153 272.1)
-
Step 600
600
#5367D3
oklch(55.5% 0.167 272)
-
Step 700
700
#4455B7
oklch(49.1% 0.155 272)
-
Step 800
800 (this color)
#34428F
oklch(41.2% 0.128 271.9)
-
Step 900
900
#303C76
oklch(37.8% 0.1 272)
-
Step 950
950
#1C2345
oklch(26.9% 0.064 272.7)
#34428F 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) | #134D92 | 0.038 |
| Deuteranopia (no green cones) | #00458D | 0.040 |
| Tritanopia (no blue cones) | #005462 | 0.108 |
| Achromatopsia (no color) | #494949 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34428F
#34428F
oklch(41.2% 0.128 271.9)
- #5B4900
#5B4900
oklch(41.2% 0.084 92.6)
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 #34428F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Blueberry #464196 ΔE 0.029
- Dark Slate Blue #483D8B ΔE 0.031
- Dusk Blue #26538D ΔE 0.048
- Light Navy #155084 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.053
- Sapphire #2138AB ΔE 0.058
- Twilight #4E518B ΔE 0.061
Use #34428F 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.