#343574
Closest named color: Twilight Blue (#0A437A). oklch(36.4% 0.106 279.1), rgb(52, 53, 116).
Aa
White text reads best on this color (11.00:1).
About this color
#343574 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.106 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.052 away. White text reads best on it, at 11.00:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.00:1 |
Values
| HEX | #343574 |
| RGB | rgb(52, 53, 116) |
| HSL | hsl(239, 38%, 33%) |
| OKLCH | oklch(36.4% 0.106 279.1) |
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 #343574 | 11.00:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #343574 | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #343574 text on white | 11.00:1 | AAA | Lc 95.3 | Preferred for body text |
| #343574 text on black | 1.90:1 | Fails | Lc -7.4 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F7
oklch(88.5% 0.044 278.4)
-
Step 300
300
#B5BCF4
oklch(80.9% 0.079 278.9)
-
Step 400
400
#9097EE
oklch(70.7% 0.127 279.1)
-
Step 500
500
#777BE9
oklch(63.2% 0.162 279.1)
-
Step 600
600
#6161D7
oklch(55.6% 0.177 279)
-
Step 700
700
#514FBA
oklch(49% 0.164 279.3)
-
Step 800
800
#424297
oklch(42.8% 0.136 279)
-
Step 900
900 (this color)
#343574
oklch(36.4% 0.106 279.1)
-
Step 950
950
#202246
oklch(27.1% 0.066 278.6)
#343574 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) | #143F76 | 0.042 |
| Deuteranopia (no green cones) | #0B3A73 | 0.044 |
| Tritanopia (no blue cones) | #18434F | 0.092 |
| Achromatopsia (no color) | #3C3C3C | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343574
#343574
oklch(36.4% 0.106 279.1)
- #483E00
#483E00
oklch(36.3% 0.075 99)
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 #343574, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.052
- Marine Blue #01386A ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.062
- Cobalt #1E488F ΔE 0.066
- Marine #042E60 ΔE 0.071
- Blueberry #464196 ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.075
Use #343574 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.