#374ED0
Closest named color: Warm Blue (#4B57DB). oklch(49.1% 0.201 269.5), rgb(55, 78, 208).
Aa
White text reads best on this color (6.63:1).
About this color
#374ED0 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.201 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.039 away. White text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #374ED0 |
| RGB | rgb(55, 78, 208) |
| HSL | hsl(231, 62%, 52%) |
| OKLCH | oklch(49.1% 0.201 269.5) |
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 #374ED0 | 6.63:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #374ED0 | 3.16:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #374ED0 text on white | 6.63:1 | AA | Lc 82.2 | Fine for body text |
| #374ED0 text on black | 3.16:1 | AA large text | Lc -19.7 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#4560EF
oklch(55.6% 0.216 269.7)
-
Step 700
700 (this color)
#374ED0
oklch(49.1% 0.201 269.5)
-
Step 800
800
#2D41A8
oklch(42.6% 0.166 269.5)
-
Step 900
900
#273985
oklch(37.7% 0.129 269.2)
-
Step 950
950
#17224E
oklch(27% 0.082 269.6)
#374ED0 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) | #0064D4 | 0.054 |
| Deuteranopia (no green cones) | #0055CE | 0.033 |
| Tritanopia (no blue cones) | #007088 | 0.159 |
| Achromatopsia (no color) | #5C5C5C | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374ED0
#374ED0
oklch(49.1% 0.201 269.5)
- #775D00
#775D00
oklch(49.1% 0.1 89.6)
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 #374ED0, closest first.
No curated palette has a color within ΔE 0.04 of #374ED0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.039
- Blue Blue #2242C7 ΔE 0.040
- Majorelle Blue #3F37C9 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Blurple #5539CC ΔE 0.054
- Azul #1D5DEC ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.065
- Neon Blue #4361EE ΔE 0.067
Use #374ED0 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.