#334A9A
Closest named color: Cobalt (#1E488F). oklch(43.6% 0.133 268.3), rgb(51, 74, 154).
Aa
White text reads best on this color (8.11:1).
About this color
#334A9A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.133 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.030 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #334A9A |
| RGB | rgb(51, 74, 154) |
| HSL | hsl(227, 50%, 40%) |
| OKLCH | oklch(43.6% 0.133 268.3) |
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 #334A9A | 8.11:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #334A9A | 2.58:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #334A9A text on white | 8.11:1 | AAA | Lc 87.8 | Fine for body text |
| #334A9A text on black | 2.58:1 | Fails | Lc -14.4 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABBFF4
oklch(80.8% 0.078 268.5)
-
Step 400
400
#809DEE
oklch(70.8% 0.123 268.2)
-
Step 500
500
#6182E9
oklch(63.1% 0.159 268.2)
-
Step 600
600
#4969D7
oklch(55.6% 0.173 268.2)
-
Step 700
700
#3B56BB
oklch(49.1% 0.162 268.5)
-
Step 800
800 (this color)
#334A9A
oklch(43.6% 0.133 268.3)
-
Step 900
900
#2A3D78
oklch(37.7% 0.103 267.8)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#334A9A 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) | #1B549D | 0.031 |
| Deuteranopia (no green cones) | #004B98 | 0.035 |
| Tritanopia (no blue cones) | #005D6B | 0.111 |
| Achromatopsia (no color) | #505050 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334A9A
#334A9A
oklch(43.6% 0.133 268.3)
- #664E00
#664E00
oklch(43.7% 0.089 88.2)
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 #334A9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.030
- Blueberry #464196 ΔE 0.032
- Dusk Blue #26538D ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.046
- Light Navy #155084 ΔE 0.050
- Twilight #4E518B ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.058
Use #334A9A 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.