#374BD7
Closest named color: Warm Blue (#4B57DB). oklch(49.2% 0.213 270), rgb(55, 75, 215).
Aa
White text reads best on this color (6.66:1).
About this color
#374BD7 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.213 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.040 away. White text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #374BD7 |
| RGB | rgb(55, 75, 215) |
| HSL | hsl(233, 67%, 53%) |
| OKLCH | oklch(49.2% 0.213 270) |
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 #374BD7 | 6.66:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #374BD7 | 3.15:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #374BD7 text on white | 6.66:1 | AA | Lc 82.2 | Fine for body text |
| #374BD7 text on black | 3.15:1 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#445DF6
oklch(55.6% 0.229 269.9)
-
Step 700
700 (this color)
#374BD7
oklch(49.2% 0.213 270)
-
Step 800
800
#2D3FAD
oklch(42.7% 0.176 269.9)
-
Step 900
900
#273789
oklch(37.6% 0.138 270.1)
-
Step 950
950
#172150
oklch(26.9% 0.087 270.5)
#374BD7 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) | #0064DB | 0.058 |
| Deuteranopia (no green cones) | #0055D4 | 0.035 |
| Tritanopia (no blue cones) | #00708A | 0.168 |
| Achromatopsia (no color) | #5C5C5C | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374BD7
#374BD7
oklch(49.2% 0.213 270)
- #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 #374BD7, closest first.
No curated palette has a color within ΔE 0.04 of #374BD7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.040
- Blue Blue #2242C7 ΔE 0.042
- Majorelle Blue #3F37C9 ΔE 0.046
- Azul #1D5DEC ΔE 0.051
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Blurple #5539CC ΔE 0.053
- Neon Blue #4361EE ΔE 0.064
- Purpley Blue #5F34E7 ΔE 0.067
Use #374BD7 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.