#34357B
Closest named color: Dark Slate Blue (#483D8B). oklch(37% 0.116 278.5), rgb(52, 53, 123).
Aa
White text reads best on this color (10.81:1).
About this color
#34357B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.116 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.81:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.81:1 |
Values
| HEX | #34357B |
| RGB | rgb(52, 53, 123) |
| HSL | hsl(239, 41%, 34%) |
| OKLCH | oklch(37% 0.116 278.5) |
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 #34357B | 10.81:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #34357B | 1.94:1 | Fails | Lc 9.1 | Not readable |
| #34357B text on white | 10.81:1 | AAA | Lc 94.8 | Preferred for body text |
| #34357B text on black | 1.94:1 | Fails | Lc -7.8 | 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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D1D7FA
oklch(88.6% 0.049 277.7)
-
Step 300
300
#B3BBF9
oklch(80.8% 0.088 278.5)
-
Step 400
400
#8E96F6
oklch(70.7% 0.14 278.6)
-
Step 500
500
#7479F2
oklch(63.2% 0.178 278.2)
-
Step 600
600
#5F5EE1
oklch(55.7% 0.194 278.4)
-
Step 700
700
#4F4CC3
oklch(49.1% 0.18 278.5)
-
Step 800
800
#403F9E
oklch(42.6% 0.15 278.4)
-
Step 900
900 (this color)
#34357B
oklch(37% 0.116 278.5)
-
Step 950
950
#1F2149
oklch(27% 0.073 278.2)
#34357B 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) | #07407D | 0.048 |
| Deuteranopia (no green cones) | #003A7A | 0.048 |
| Tritanopia (no blue cones) | #0F4552 | 0.102 |
| Achromatopsia (no color) | #3D3D3D | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34357B
#34357B
oklch(37% 0.116 278.5)
- #4A4000
#4A4000
oklch(37% 0.077 99.2)
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 #34357B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.052
- Marine Blue #01386A ΔE 0.059
- Cobalt #1E488F ΔE 0.060
- Blueberry #464196 ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.072
- Light Navy #155084 ΔE 0.077
- Marine #042E60 ΔE 0.077
Use #34357B 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.