#374FA5
Closest named color: Blueberry (#464196). oklch(45.7% 0.141 268.6), rgb(55, 79, 165).
Aa
White text reads best on this color (7.43:1).
About this color
#374FA5 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.141 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.043 away. White text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #374FA5 |
| RGB | rgb(55, 79, 165) |
| HSL | hsl(227, 50%, 43%) |
| OKLCH | oklch(45.7% 0.141 268.6) |
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 #374FA5 | 7.43:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #374FA5 | 2.82:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #374FA5 text on white | 7.43:1 | AAA | Lc 85.5 | Fine for body text |
| #374FA5 text on black | 2.82:1 | Fails | Lc -16.5 | 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
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#AABFF7
oklch(80.9% 0.083 268.6)
-
Step 400
400
#7E9CF3
oklch(70.7% 0.132 268.5)
-
Step 500
500
#5F81EF
oklch(63.2% 0.169 268.4)
-
Step 600
600
#4867DD
oklch(55.6% 0.183 268.7)
-
Step 700
700
#3955C0
oklch(49.1% 0.171 268.3)
-
Step 800
800 (this color)
#374FA5
oklch(45.7% 0.141 268.6)
-
Step 900
900
#293C7B
oklch(37.7% 0.11 268.2)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#374FA5 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) | #1B5AA8 | 0.034 |
| Deuteranopia (no green cones) | #0050A3 | 0.037 |
| Tritanopia (no blue cones) | #006372 | 0.117 |
| Achromatopsia (no color) | #555555 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374FA5
#374FA5
oklch(45.7% 0.141 268.6)
- #6D5400
#6D5400
oklch(45.9% 0.094 88.6)
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 #374FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.043
- Dusk Blue #26538D ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.050
- Cobalt #1E488F ΔE 0.050
- Twilight #4E518B ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.061
- Dusky Blue #475F94 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.062
Use #374FA5 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.