#334E9F
Closest named color: Dusk Blue (#26538D). oklch(44.9% 0.135 267), rgb(51, 78, 159).
Aa
White text reads best on this color (7.68:1).
About this color
#334E9F is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.135 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.037 away. White text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #334E9F |
| RGB | rgb(51, 78, 159) |
| HSL | hsl(225, 51%, 41%) |
| OKLCH | oklch(44.9% 0.135 267) |
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 #334E9F | 7.68:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #334E9F | 2.73:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #334E9F text on white | 7.68:1 | AAA | Lc 86.4 | Fine for body text |
| #334E9F text on black | 2.73:1 | Fails | Lc -15.7 | Dividers and decoration only |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F5
oklch(81% 0.079 267.1)
-
Step 400
400
#7D9DF0
oklch(70.7% 0.127 267.1)
-
Step 500
500
#5D82EA
oklch(63% 0.162 267)
-
Step 600
600
#4569D9
oklch(55.6% 0.176 267.1)
-
Step 700
700
#3757BC
oklch(49.1% 0.163 266.9)
-
Step 800
800 (this color)
#334E9F
oklch(44.9% 0.135 267)
-
Step 900
900
#283D79
oklch(37.7% 0.105 266.8)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#334E9F 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) | #2058A2 | 0.029 |
| Deuteranopia (no green cones) | #004E9D | 0.034 |
| Tritanopia (no blue cones) | #00616F | 0.111 |
| Achromatopsia (no color) | #535353 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334E9F
#334E9F
oklch(44.9% 0.135 267)
- #6B5100
#6B5100
oklch(45% 0.092 87.1)
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 #334E9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.037
- Cobalt #1E488F ΔE 0.039
- Blueberry #464196 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.047
- Twilight #4E518B ΔE 0.050
- Light Navy #155084 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.056
Use #334E9F 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.