#334F9E
Closest named color: Dusk Blue (#26538D). oklch(45% 0.133 266.4), rgb(51, 79, 158).
Aa
White text reads best on this color (7.62:1).
About this color
#334F9E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.133 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.034 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #334F9E |
| RGB | rgb(51, 79, 158) |
| HSL | hsl(224, 51%, 41%) |
| OKLCH | oklch(45% 0.133 266.4) |
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 #334F9E | 7.62:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #334F9E | 2.75:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #334F9E text on white | 7.62:1 | AAA | Lc 86.2 | Fine for body text |
| #334F9E text on black | 2.75:1 | Fails | Lc -15.9 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F4
oklch(80.9% 0.078 266.8)
-
Step 400
400
#7D9EEE
oklch(70.8% 0.123 266.3)
-
Step 500
500
#5D83E9
oklch(63.1% 0.159 266.5)
-
Step 600
600
#446AD7
oklch(55.6% 0.173 266.4)
-
Step 700
700
#3658BA
oklch(49.1% 0.16 266.2)
-
Step 800
800 (this color)
#334F9E
oklch(45% 0.133 266.4)
-
Step 900
900
#283D78
oklch(37.6% 0.104 266.7)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#334F9E 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) | #2459A1 | 0.028 |
| Deuteranopia (no green cones) | #054F9C | 0.032 |
| Tritanopia (no blue cones) | #00616F | 0.108 |
| Achromatopsia (no color) | #545454 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334F9E
#334F9E
oklch(45% 0.133 266.4)
- #6C5100
#6C5100
oklch(45.1% 0.092 86.3)
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 #334F9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.034
- Cobalt #1E488F ΔE 0.039
- Blueberry #464196 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.044
- Twilight #4E518B ΔE 0.048
- Light Navy #155084 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.057
Use #334F9E 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.