#343D9D
Closest named color: Blueberry (#464196). oklch(41.3% 0.154 273.5), rgb(52, 61, 157).
Aa
White text reads best on this color (9.12:1).
About this color
#343D9D is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.154 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.032 away. White text reads best on it, at 9.12:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #343D9D |
| RGB | rgb(52, 61, 157) |
| HSL | hsl(235, 50%, 41%) |
| OKLCH | oklch(41.3% 0.154 273.5) |
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 #343D9D | 9.12:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #343D9D | 2.30:1 | Fails | Lc 13.4 | Not readable |
| #343D9D text on white | 9.12:1 | AAA | Lc 90.6 | Preferred for body text |
| #343D9D text on black | 2.30:1 | Fails | Lc -11.7 | 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 800.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#AEBDFB
oklch(80.9% 0.089 273.7)
-
Step 400
400
#8498FA
oklch(70.7% 0.145 273.4)
-
Step 500
500
#687BF7
oklch(63.1% 0.185 273.4)
-
Step 600
600
#5260E6
oklch(55.6% 0.201 273.4)
-
Step 700
700
#444EC8
oklch(49.1% 0.187 273.7)
-
Step 800
800 (this color)
#343D9D
oklch(41.3% 0.154 273.5)
-
Step 900
900
#2F3880
oklch(37.6% 0.121 273.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#343D9D 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) | #004DA0 | 0.049 |
| Deuteranopia (no green cones) | #00449B | 0.041 |
| Tritanopia (no blue cones) | #005567 | 0.127 |
| Achromatopsia (no color) | #484848 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343D9D
#343D9D
oklch(41.3% 0.154 273.5)
- #5B4A00
#5B4A00
oklch(41.5% 0.085 93.8)
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 #343D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.032
- Sapphire #2138AB ΔE 0.035
- Cobalt #1E488F ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.042
- Dusk Blue #26538D ΔE 0.067
- Indigo Blue #3A18B1 ΔE 0.069
- Blue Blue #2242C7 ΔE 0.070
- Majorelle Blue #3F37C9 ΔE 0.072
Use #343D9D 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.