#334FA5
Closest named color: Dusk Blue (#26538D). oklch(45.5% 0.143 267), rgb(51, 79, 165).
Aa
White text reads best on this color (7.49:1).
About this color
#334FA5 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.143 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.044 away. White text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #334FA5 |
| RGB | rgb(51, 79, 165) |
| HSL | hsl(225, 53%, 42%) |
| OKLCH | oklch(45.5% 0.143 267) |
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 #334FA5 | 7.49:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #334FA5 | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #334FA5 text on white | 7.49:1 | AAA | Lc 85.7 | Fine for body text |
| #334FA5 text on black | 2.80:1 | Fails | Lc -16.3 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F7
oklch(80.9% 0.083 266.3)
-
Step 400
400
#7B9DF4
oklch(70.8% 0.133 266.8)
-
Step 500
500
#5B81EF
oklch(63% 0.17 267.1)
-
Step 600
600
#4368DE
oklch(55.7% 0.185 267)
-
Step 700
700
#3555C1
oklch(49% 0.173 267.2)
-
Step 800
800 (this color)
#334FA5
oklch(45.5% 0.143 267)
-
Step 900
900
#273C7C
oklch(37.6% 0.112 267.2)
-
Step 950
950
#172449
oklch(27.1% 0.071 267.1)
#334FA5 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) | #1A5AA8 | 0.032 |
| Deuteranopia (no green cones) | #0050A3 | 0.032 |
| Tritanopia (no blue cones) | #006372 | 0.116 |
| Achromatopsia (no color) | #555555 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334FA5
#334FA5
oklch(45.5% 0.143 267)
- #6D5200
#6D5200
oklch(45.4% 0.093 86.5)
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 #334FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.044
- Blueberry #464196 ΔE 0.045
- Cobalt #1E488F ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.051
- Twilight #4E518B ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.061
- Light Navy #155084 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.063
Use #334FA5 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.