#34337D
Closest named color: Dark Slate Blue (#483D8B). oklch(36.7% 0.122 279.1), rgb(52, 51, 125).
Aa
White text reads best on this color (10.96:1).
About this color
#34337D is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.122 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 10.96:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #34337D |
| RGB | rgb(52, 51, 125) |
| HSL | hsl(241, 42%, 35%) |
| OKLCH | oklch(36.7% 0.122 279.1) |
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 #34337D | 10.96:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #34337D | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #34337D text on white | 10.96:1 | AAA | Lc 95.1 | Preferred for body text |
| #34337D text on black | 1.91:1 | Fails | Lc -7.6 | 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 900.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D1D6FB
oklch(88.4% 0.051 279.2)
-
Step 300
300
#B4BBFB
oklch(80.9% 0.091 279.3)
-
Step 400
400
#8E95FA
oklch(70.8% 0.147 278.9)
-
Step 500
500
#7576F7
oklch(63% 0.188 279.2)
-
Step 600
600
#605BE6
oklch(55.6% 0.204 279)
-
Step 700
700
#504AC8
oklch(49.2% 0.189 279)
-
Step 800
800
#413DA1
oklch(42.6% 0.157 279.2)
-
Step 900
900 (this color)
#34337D
oklch(36.7% 0.122 279.1)
-
Step 950
950
#1F204B
oklch(26.9% 0.078 278.8)
#34337D 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) | #003F7F | 0.052 |
| Deuteranopia (no green cones) | #00397B | 0.049 |
| Tritanopia (no blue cones) | #0D4452 | 0.106 |
| Achromatopsia (no color) | #3C3C3C | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34337D
#34337D
oklch(36.7% 0.122 279.1)
- #493F00
#493F00
oklch(36.7% 0.076 99.1)
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 #34337D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Twilight Blue #0A437A ΔE 0.056
- Marine Blue #01386A ΔE 0.062
- Cobalt #1E488F ΔE 0.062
- Blueberry #464196 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.076
- Marine #042E60 ΔE 0.078
- Sapphire #2138AB ΔE 0.080
Use #34337D 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.