#34398A
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.133 275.7), rgb(52, 57, 138).
Aa
White text reads best on this color (10.00:1).
About this color
#34398A is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.133 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.035 away. White text reads best on it, at 10.00:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.00:1 |
Values
| HEX | #34398A |
| RGB | rgb(52, 57, 138) |
| HSL | hsl(237, 45%, 37%) |
| OKLCH | oklch(39% 0.133 275.7) |
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 #34398A | 10.00:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #34398A | 2.09:1 | Fails | Lc 11.1 | Not readable |
| #34398A text on white | 10.00:1 | AAA | Lc 92.9 | Preferred for body text |
| #34398A text on black | 2.09:1 | Fails | Lc -9.6 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CED7FE
oklch(88.5% 0.055 275)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8796FF
oklch(70.7% 0.154 275.6)
-
Step 500
500
#6C77FF
oklch(63.2% 0.199 275.6)
-
Step 600
600
#5759F1
oklch(55.6% 0.222 275.8)
-
Step 700
700
#4848D2
oklch(49.2% 0.206 275.7)
-
Step 800
800
#3A3CA9
oklch(42.6% 0.17 275.6)
-
Step 900
900 (this color)
#34398A
oklch(39% 0.133 275.7)
-
Step 950
950
#1C204E
oklch(26.9% 0.084 275.5)
#34398A 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) | #00468D | 0.049 |
| Deuteranopia (no green cones) | #003F88 | 0.045 |
| Tritanopia (no blue cones) | #004C5B | 0.114 |
| Achromatopsia (no color) | #424242 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34398A
#34398A
oklch(39% 0.133 275.7)
- #524400
#524400
oklch(39% 0.08 95.7)
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 #34398A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.041
- Cobalt #1E488F ΔE 0.043
- Twilight Blue #0A437A ΔE 0.054
- Sapphire #2138AB ΔE 0.059
- Light Navy #155084 ΔE 0.068
- Dusk Blue #26538D ΔE 0.071
- Marine Blue #01386A ΔE 0.075
Use #34398A 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.