#374CC9
Closest named color: Blue Blue (#2242C7). oklch(48.1% 0.194 270), rgb(55, 76, 201).
Aa
White text reads best on this color (6.90:1).
About this color
#374CC9 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.194 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.034 away. White text reads best on it, at 6.90:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.03:1 |
| White text | 6.90:1 |
Values
| HEX | #374CC9 |
| RGB | rgb(55, 76, 201) |
| HSL | hsl(231, 57%, 50%) |
| OKLCH | oklch(48.1% 0.194 270) |
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 #374CC9 | 6.90:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #374CC9 | 3.03:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #374CC9 text on white | 6.90:1 | AA | Lc 83.3 | Fine for body text |
| #374CC9 text on black | 3.03:1 | AA large text | Lc -18.7 | 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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CBD8FD
oklch(88.4% 0.053 270)
-
Step 300
300
#A9BEFE
oklch(80.9% 0.094 270.2)
-
Step 400
400
#7C9AFE
oklch(70.8% 0.15 269.7)
-
Step 500
500
#5E7CFC
oklch(63% 0.193 270.1)
-
Step 600
600
#4761EB
oklch(55.5% 0.209 270)
-
Step 700
700 (this color)
#374CC9
oklch(48.1% 0.194 270)
-
Step 800
800
#2F42A5
oklch(42.7% 0.16 269.9)
-
Step 900
900
#293983
oklch(37.7% 0.126 270.1)
-
Step 950
950
#18224D
oklch(27% 0.08 270.4)
#374CC9 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) | #0061CD | 0.053 |
| Deuteranopia (no green cones) | #0053C7 | 0.034 |
| Tritanopia (no blue cones) | #006C83 | 0.154 |
| Achromatopsia (no color) | #5A5A5A | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374CC9
#374CC9
oklch(48.1% 0.194 270)
- #735A00
#735A00
oklch(47.9% 0.098 89.9)
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 #374CC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.034
- Majorelle Blue #3F37C9 ΔE 0.042
- Blue With A Hint Of Purple #533CC6 ΔE 0.047
- Warm Blue #4B57DB ΔE 0.048
- Blurple #5539CC ΔE 0.052
- Bluey Purple #6241C7 ΔE 0.063
- Azul #1D5DEC ΔE 0.066
- Iris #6258C4 ΔE 0.070
Use #374CC9 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.