#374AA1
Closest named color: Blueberry (#464196). oklch(44.4% 0.142 270.3), rgb(55, 74, 161).
Aa
White text reads best on this color (7.90:1).
About this color
#374AA1 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.142 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.032 away. White text reads best on it, at 7.90:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #374AA1 |
| RGB | rgb(55, 74, 161) |
| HSL | hsl(229, 49%, 42%) |
| OKLCH | oklch(44.4% 0.142 270.3) |
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 #374AA1 | 7.90:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #374AA1 | 2.65:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #374AA1 text on white | 7.90:1 | AAA | Lc 87.1 | Fine for body text |
| #374AA1 text on black | 2.65:1 | Fails | Lc -15.0 | 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
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF7
oklch(80.8% 0.083 270.9)
-
Step 400
400
#819BF3
oklch(70.7% 0.132 270.3)
-
Step 500
500
#637FEF
oklch(63% 0.17 270.3)
-
Step 600
600
#4C65DD
oklch(55.5% 0.185 270.4)
-
Step 700
700
#3E53C0
oklch(49% 0.172 270.5)
-
Step 800
800 (this color)
#374AA1
oklch(44.4% 0.142 270.3)
-
Step 900
900
#2C3B7C
oklch(37.7% 0.111 270.5)
-
Step 950
950
#1A2348
oklch(27% 0.07 270.8)
#374AA1 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) | #0F56A4 | 0.040 |
| Deuteranopia (no green cones) | #004D9F | 0.038 |
| Tritanopia (no blue cones) | #005F6E | 0.119 |
| Achromatopsia (no color) | #515151 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374AA1
#374AA1
oklch(44.4% 0.142 270.3)
- #675100
#675100
oklch(44.5% 0.091 90.6)
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 #374AA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.032
- Cobalt #1E488F ΔE 0.041
- Dusk Blue #26538D ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.050
- Twilight #4E518B ΔE 0.054
- Sapphire #2138AB ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.057
- Light Navy #155084 ΔE 0.061
Use #374AA1 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.