#374EA8
Closest named color: Blueberry (#464196). oklch(45.8% 0.147 269.1), rgb(55, 78, 168).
Aa
White text reads best on this color (7.45:1).
About this color
#374EA8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.147 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.044 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #374EA8 |
| RGB | rgb(55, 78, 168) |
| HSL | hsl(228, 51%, 44%) |
| OKLCH | oklch(45.8% 0.147 269.1) |
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 #374EA8 | 7.45:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #374EA8 | 2.81:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #374EA8 text on white | 7.45:1 | AAA | Lc 85.5 | Fine for body text |
| #374EA8 text on black | 2.81:1 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#AABFF9
oklch(80.9% 0.086 269)
-
Step 400
400
#7E9BF6
oklch(70.7% 0.137 269.3)
-
Step 500
500
#5F7FF2
oklch(63% 0.175 269.2)
-
Step 600
600
#4865E1
oklch(55.5% 0.191 269.3)
-
Step 700
700
#3A53C3
oklch(49% 0.177 269.3)
-
Step 800
800 (this color)
#374EA8
oklch(45.8% 0.147 269.1)
-
Step 900
900
#293B7E
oklch(37.7% 0.115 269)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#374EA8 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) | #115AAB | 0.038 |
| Deuteranopia (no green cones) | #0050A6 | 0.037 |
| Tritanopia (no blue cones) | #006373 | 0.121 |
| Achromatopsia (no color) | #555555 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374EA8
#374EA8
oklch(45.8% 0.147 269.1)
- #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 #374EA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.044
- Dusk Blue #26538D ΔE 0.051
- Cobalt #1E488F ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.055
- Twilight #4E518B ΔE 0.058
- Blue Blue #2242C7 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.063
- Sapphire #2138AB ΔE 0.063
Use #374EA8 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.