#374ECB
Closest named color: Blue Blue (#2242C7). oklch(48.6% 0.194 269.6), rgb(55, 78, 203).
Aa
White text reads best on this color (6.74:1).
About this color
#374ECB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, 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 0.038 away. White text reads best on it, at 6.74:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.11:1 |
| White text | 6.74:1 |
Values
| HEX | #374ECB |
| RGB | rgb(55, 78, 203) |
| HSL | hsl(231, 59%, 51%) |
| OKLCH | oklch(48.6% 0.194 269.6) |
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 #374ECB | 6.74:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #374ECB | 3.11:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #374ECB text on white | 6.74:1 | AA | Lc 82.6 | Fine for body text |
| #374ECB text on black | 3.11:1 | AA large text | Lc -19.3 | 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
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD8FD
oklch(88.4% 0.053 270)
-
Step 300
300
#A8BEFE
oklch(80.8% 0.094 269.6)
-
Step 400
400
#7C9AFE
oklch(70.8% 0.15 269.7)
-
Step 500
500
#5D7DFC
oklch(63.2% 0.192 269.6)
-
Step 600
600
#4662EB
oklch(55.7% 0.208 269.5)
-
Step 700
700 (this color)
#374ECB
oklch(48.6% 0.194 269.6)
-
Step 800
800
#2E42A5
oklch(42.6% 0.161 269.6)
-
Step 900
900
#283983
oklch(37.6% 0.126 269.6)
-
Step 950
950
#17224D
oklch(26.9% 0.081 269.5)
#374ECB 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) | #0063CF | 0.053 |
| Deuteranopia (no green cones) | #0055C9 | 0.034 |
| Tritanopia (no blue cones) | #006E85 | 0.154 |
| Achromatopsia (no color) | #5B5B5B | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374ECB
#374ECB
oklch(48.6% 0.194 269.6)
- #765C00
#765C00
oklch(48.7% 0.1 89.5)
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 #374ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Warm Blue #4B57DB ΔE 0.043
- Majorelle Blue #3F37C9 ΔE 0.046
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Blurple #5539CC ΔE 0.054
- Azul #1D5DEC ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.064
- Iris #6258C4 ΔE 0.067
Use #374ECB 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.