#374EBC
Closest named color: Blue Blue (#2242C7). oklch(47.4% 0.175 269.5), rgb(55, 78, 188).
Aa
White text reads best on this color (7.05:1).
About this color
#374EBC is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.175 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.041 away. White text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #374EBC |
| RGB | rgb(55, 78, 188) |
| HSL | hsl(230, 55%, 48%) |
| OKLCH | oklch(47.4% 0.175 269.5) |
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 #374EBC | 7.05:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #374EBC | 2.97:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #374EBC text on white | 7.05:1 | AAA | Lc 83.9 | Fine for body text |
| #374EBC text on black | 2.97:1 | Fails | Lc -18.0 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBFF8
oklch(81% 0.084 269.5)
-
Step 400
400
#7F9BF5
oklch(70.7% 0.136 269.6)
-
Step 500
500
#617FF1
oklch(63.1% 0.174 269.8)
-
Step 600
600
#4966DF
oklch(55.6% 0.187 269.3)
-
Step 700
700 (this color)
#374EBC
oklch(47.4% 0.175 269.5)
-
Step 800
800
#31459D
oklch(42.7% 0.145 269.6)
-
Step 900
900
#2A3B7D
oklch(37.7% 0.114 269.4)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#374EBC 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) | #005FC0 | 0.047 |
| Deuteranopia (no green cones) | #0053BA | 0.034 |
| Tritanopia (no blue cones) | #00697D | 0.140 |
| Achromatopsia (no color) | #595959 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374EBC
#374EBC
oklch(47.4% 0.175 269.5)
- #715800
#715800
oklch(47.3% 0.097 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 #374EBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.041
- Majorelle Blue #3F37C9 ΔE 0.051
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.060
- Blurple #5539CC ΔE 0.060
- Bluey Purple #6241C7 ΔE 0.067
- Sapphire #2138AB ΔE 0.067
- Blueberry #464196 ΔE 0.068
Use #374EBC 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.