#374DC5
Closest named color: Blue Blue (#2242C7). oklch(47.9% 0.188 269.8), rgb(55, 77, 197).
Aa
White text reads best on this color (6.93:1).
About this color
#374DC5 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.188 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.036 away. White text reads best on it, at 6.93:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.03:1 |
| White text | 6.93:1 |
Values
| HEX | #374DC5 |
| RGB | rgb(55, 77, 197) |
| HSL | hsl(231, 56%, 49%) |
| OKLCH | oklch(47.9% 0.188 269.8) |
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 #374DC5 | 6.93:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #374DC5 | 3.03:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #374DC5 text on white | 6.93:1 | AA | Lc 83.4 | Fine for body text |
| #374DC5 text on black | 3.03:1 | AA large text | Lc -18.5 | 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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400
#7D9AFB
oklch(70.7% 0.146 269.8)
-
Step 500
500
#5F7DF8
oklch(63% 0.186 270)
-
Step 600
600
#4863E7
oklch(55.6% 0.201 269.8)
-
Step 700
700 (this color)
#374DC5
oklch(47.9% 0.188 269.8)
-
Step 800
800
#3043A2
oklch(42.7% 0.155 270)
-
Step 900
900
#293A81
oklch(37.7% 0.121 269.6)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#374DC5 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) | #0060C9 | 0.050 |
| Deuteranopia (no green cones) | #0053C3 | 0.034 |
| Tritanopia (no blue cones) | #006C81 | 0.152 |
| Achromatopsia (no color) | #5A5A5A | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374DC5
#374DC5
oklch(47.9% 0.188 269.8)
- #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 #374DC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.036
- Majorelle Blue #3F37C9 ΔE 0.044
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Warm Blue #4B57DB ΔE 0.050
- Blurple #5539CC ΔE 0.054
- Bluey Purple #6241C7 ΔE 0.064
- Iris #6258C4 ΔE 0.068
- Azul #1D5DEC ΔE 0.070
Use #374DC5 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.