#343671
Closest named color: Twilight Blue (#0A437A). oklch(36.4% 0.1 278.8), rgb(52, 54, 113).
Aa
White text reads best on this color (10.98:1).
About this color
#343671 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.100 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.050 away. White text reads best on it, at 10.98:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.98:1 |
Values
| HEX | #343671 |
| RGB | rgb(52, 54, 113) |
| HSL | hsl(238, 37%, 32%) |
| OKLCH | oklch(36.4% 0.1 278.8) |
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 #343671 | 10.98:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #343671 | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #343671 text on white | 10.98:1 | AAA | Lc 95.2 | Preferred for body text |
| #343671 text on black | 1.91:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B5BCF1
oklch(80.8% 0.075 278.7)
-
Step 400
400
#9098EA
oklch(70.6% 0.12 278.6)
-
Step 500
500
#777CE3
oklch(63% 0.153 279)
-
Step 600
600
#6163D1
oklch(55.6% 0.166 278.8)
-
Step 700
700
#5151B5
oklch(49% 0.154 279.1)
-
Step 800
800
#424393
oklch(42.7% 0.129 278.9)
-
Step 900
900 (this color)
#343671
oklch(36.4% 0.1 278.8)
-
Step 950
950
#202244
oklch(26.9% 0.063 278.8)
#343671 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) | #1A3F73 | 0.037 |
| Deuteranopia (no green cones) | #133A70 | 0.039 |
| Tritanopia (no blue cones) | #1B434E | 0.087 |
| Achromatopsia (no color) | #3C3C3C | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343671
#343671
oklch(36.4% 0.1 278.8)
- #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 #343671, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.050
- Marine Blue #01386A ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.058
- Cobalt #1E488F ΔE 0.067
- Marine #042E60 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.069
- Blueberry #464196 ΔE 0.074
Use #343671 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.