#374CA9
Closest named color: Blueberry (#464196). oklch(45.4% 0.151 269.8), rgb(55, 76, 169).
Aa
White text reads best on this color (7.58:1).
About this color
#374CA9 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.151 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.042 away. White text reads best on it, at 7.58:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.76:1 |
| White text | 7.58:1 |
Values
| HEX | #374CA9 |
| RGB | rgb(55, 76, 169) |
| HSL | hsl(229, 51%, 44%) |
| OKLCH | oklch(45.4% 0.151 269.8) |
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 #374CA9 | 7.58:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #374CA9 | 2.76:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #374CA9 text on white | 7.58:1 | AAA | Lc 86.0 | Fine for body text |
| #374CA9 text on black | 2.76:1 | Fails | Lc -16.1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#AABEFA
oklch(80.8% 0.088 270.1)
-
Step 400
400
#7E9BF8
oklch(70.8% 0.14 269.5)
-
Step 500
500
#607EF5
oklch(63.1% 0.18 269.9)
-
Step 600
600
#4964E4
oklch(55.6% 0.196 269.9)
-
Step 700
700
#3B52C6
oklch(49.1% 0.182 269.8)
-
Step 800
800 (this color)
#374CA9
oklch(45.4% 0.151 269.8)
-
Step 900
900
#2A3A7F
oklch(37.6% 0.118 270)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#374CA9 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) | #0259AC | 0.043 |
| Deuteranopia (no green cones) | #004FA7 | 0.037 |
| Tritanopia (no blue cones) | #006273 | 0.124 |
| Achromatopsia (no color) | #545454 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374CA9
#374CA9
oklch(45.4% 0.151 269.8)
- #6B5300
#6B5300
oklch(45.4% 0.093 89.3)
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 #374CA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.052
- Dusk Blue #26538D ΔE 0.055
- Sapphire #2138AB ΔE 0.058
- Blue Blue #2242C7 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.061
Use #374CA9 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.