#343971
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.095 276.9), rgb(52, 57, 113).
Aa
White text reads best on this color (10.66:1).
About this color
#343971 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.095 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.046 away. White text reads best on it, at 10.66:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #343971 |
| RGB | rgb(52, 57, 113) |
| HSL | hsl(235, 37%, 32%) |
| OKLCH | oklch(37% 0.095 276.9) |
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 #343971 | 10.66:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #343971 | 1.96:1 | Fails | Lc 9.4 | Not readable |
| #343971 text on white | 10.66:1 | AAA | Lc 94.6 | Preferred for body text |
| #343971 text on black | 1.96:1 | Fails | Lc -8.0 | 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
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D7F4
oklch(88.4% 0.04 277.8)
-
Step 300
300
#B4BDEF
oklch(80.9% 0.071 276.7)
-
Step 400
400
#8E9AE7
oklch(70.8% 0.113 276.3)
-
Step 500
500
#747EE0
oklch(63% 0.146 276.9)
-
Step 600
600
#5E66CE
oklch(55.7% 0.158 276.7)
-
Step 700
700
#4E54B2
oklch(49.2% 0.147 276.8)
-
Step 800
800
#404590
oklch(42.7% 0.122 277.1)
-
Step 900
900 (this color)
#343971
oklch(37% 0.095 276.9)
-
Step 950
950
#1F2343
oklch(27% 0.059 276.3)
#343971 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) | #204173 | 0.031 |
| Deuteranopia (no green cones) | #1A3C70 | 0.032 |
| Tritanopia (no blue cones) | #1A454F | 0.084 |
| Achromatopsia (no color) | #3E3E3E | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343971
#343971
oklch(37% 0.095 276.9)
- #4B3F00
#4B3F00
oklch(36.9% 0.076 96.9)
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 #343971, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.046
- Marine Blue #01386A ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.062
- Cobalt #1E488F ΔE 0.063
- Light Navy #155084 ΔE 0.071
- Blueberry #464196 ΔE 0.071
Use #343971 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.