#34377E
Closest named color: Dark Slate Blue (#483D8B). oklch(37.6% 0.118 277.3), rgb(52, 55, 126).
Aa
White text reads best on this color (10.53:1).
About this color
#34377E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.118 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 10.53:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.53:1 |
Values
| HEX | #34377E |
| RGB | rgb(52, 55, 126) |
| HSL | hsl(238, 42%, 35%) |
| OKLCH | oklch(37.6% 0.118 277.3) |
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 #34377E | 10.53:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #34377E | 1.99:1 | Fails | Lc 9.8 | Not readable |
| #34377E text on white | 10.53:1 | AAA | Lc 94.2 | Preferred for body text |
| #34377E text on black | 1.99:1 | Fails | Lc -8.4 | 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
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B2BCFA
oklch(81% 0.088 277.1)
-
Step 400
400
#8C96F7
oklch(70.6% 0.141 277.7)
-
Step 500
500
#7179F4
oklch(63.1% 0.181 277.1)
-
Step 600
600
#5C5EE2
oklch(55.5% 0.196 277.3)
-
Step 700
700
#4C4CC5
oklch(49% 0.184 277.2)
-
Step 800
800
#3E409F
oklch(42.7% 0.151 277)
-
Step 900
900 (this color)
#34377E
oklch(37.6% 0.118 277.3)
-
Step 950
950
#1E214A
oklch(27% 0.075 277)
#34377E 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) | #094280 | 0.046 |
| Deuteranopia (no green cones) | #003C7D | 0.047 |
| Tritanopia (no blue cones) | #094755 | 0.102 |
| Achromatopsia (no color) | #3F3F3F | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34377E
#34377E
oklch(37.6% 0.118 277.3)
- #4D4100
#4D4100
oklch(37.6% 0.078 97.3)
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 #34377E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Twilight Blue #0A437A ΔE 0.049
- Cobalt #1E488F ΔE 0.053
- Blueberry #464196 ΔE 0.056
- Marine Blue #01386A ΔE 0.062
- Light Navy #155084 ΔE 0.072
- Prussian Blue #1D3557 ΔE 0.076
- Sapphire #2138AB ΔE 0.077
Use #34377E 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.