#374DAA
Closest named color: Blueberry (#464196). oklch(45.7% 0.151 269.5), rgb(55, 77, 170).
Aa
White text reads best on this color (7.48:1).
About this color
#374DAA is a medium-dark, vivid blue. In OKLCH its lightness is 46%, 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 0.045 away. White text reads best on it, at 7.48:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.80:1 |
| White text | 7.48:1 |
Values
| HEX | #374DAA |
| RGB | rgb(55, 77, 170) |
| HSL | hsl(229, 51%, 44%) |
| OKLCH | oklch(45.7% 0.151 269.5) |
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 #374DAA | 7.48:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #374DAA | 2.80:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #374DAA text on white | 7.48:1 | AAA | Lc 85.7 | Fine for body text |
| #374DAA text on black | 2.80:1 | Fails | Lc -16.4 | 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
#AABFFB
oklch(81% 0.088 269.4)
-
Step 400
400
#7E9BF8
oklch(70.8% 0.14 269.5)
-
Step 500
500
#5F7EF5
oklch(63% 0.181 269.6)
-
Step 600
600
#4864E4
oklch(55.6% 0.196 269.6)
-
Step 700
700
#3A52C6
oklch(49.1% 0.182 269.5)
-
Step 800
800 (this color)
#374DAA
oklch(45.7% 0.151 269.5)
-
Step 900
900
#293A7F
oklch(37.6% 0.118 269.5)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#374DAA 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) | #055AAD | 0.042 |
| Deuteranopia (no green cones) | #0050A8 | 0.036 |
| Tritanopia (no blue cones) | #006374 | 0.123 |
| Achromatopsia (no color) | #555555 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374DAA
#374DAA
oklch(45.7% 0.151 269.5)
- #6C5400
#6C5400
oklch(45.8% 0.094 89.5)
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 #374DAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.045
- Cobalt #1E488F ΔE 0.054
- Dusk Blue #26538D ΔE 0.055
- Blue Blue #2242C7 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
- Sapphire #2138AB ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.064
Use #374DAA 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.