#374CAB
Closest named color: Blueberry (#464196). oklch(45.6% 0.154 269.9), rgb(55, 76, 171).
Aa
White text reads best on this color (7.54:1).
About this color
#374CAB is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.154 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 7.54:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #374CAB |
| RGB | rgb(55, 76, 171) |
| HSL | hsl(229, 51%, 44%) |
| OKLCH | oklch(45.6% 0.154 269.9) |
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 #374CAB | 7.54:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #374CAB | 2.78:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #374CAB text on white | 7.54:1 | AAA | Lc 85.8 | Fine for body text |
| #374CAB text on black | 2.78:1 | Fails | Lc -16.2 | 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
#AABEFC
oklch(80.9% 0.091 270.5)
-
Step 400
400
#7E9AFA
oklch(70.7% 0.144 270.1)
-
Step 500
500
#5F7EF7
oklch(63.1% 0.183 269.7)
-
Step 600
600
#4863E6
oklch(55.6% 0.2 269.8)
-
Step 700
700
#3A51C8
oklch(49.1% 0.186 269.8)
-
Step 800
800 (this color)
#374CAB
oklch(45.6% 0.154 269.9)
-
Step 900
900
#2A3A80
oklch(37.7% 0.119 270.1)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#374CAB 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) | #005AAE | 0.044 |
| Deuteranopia (no green cones) | #004FA9 | 0.037 |
| Tritanopia (no blue cones) | #006374 | 0.126 |
| Achromatopsia (no color) | #545454 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374CAB
#374CAB
oklch(45.6% 0.154 269.9)
- #6B5400
#6B5400
oklch(45.7% 0.093 90.3)
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 #374CAB, 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 0.055
- Blue Blue #2242C7 ΔE 0.056
- Dusk Blue #26538D ΔE 0.057
- Sapphire #2138AB ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.062
- Twilight #4E518B ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.064
Use #374CAB 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.