#374DBF
Closest named color: Blue Blue (#2242C7). oklch(47.4% 0.18 269.8), rgb(55, 77, 191).
Aa
White text reads best on this color (7.05:1).
About this color
#374DBF is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.180 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 7.05:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #374DBF |
| RGB | rgb(55, 77, 191) |
| HSL | hsl(230, 55%, 48%) |
| OKLCH | oklch(47.4% 0.18 269.8) |
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 #374DBF | 7.05:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #374DBF | 2.97:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #374DBF text on white | 7.05:1 | AAA | Lc 83.9 | Fine for body text |
| #374DBF 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD8FA
oklch(88.4% 0.049 270)
-
Step 300
300
#AABFFA
oklch(81% 0.087 269.2)
-
Step 400
400
#7F9BF7
oklch(70.8% 0.139 269.8)
-
Step 500
500
#607FF4
oklch(63.2% 0.178 269.6)
-
Step 600
600
#4964E2
oklch(55.5% 0.193 269.8)
-
Step 700
700 (this color)
#374DBF
oklch(47.4% 0.18 269.8)
-
Step 800
800
#31449F
oklch(42.7% 0.149 270)
-
Step 900
900
#2A3B7E
oklch(37.8% 0.115 269.5)
-
Step 950
950
#19234A
oklch(27.1% 0.073 270.1)
#374DBF 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) | #005FC3 | 0.049 |
| Deuteranopia (no green cones) | #0052BD | 0.035 |
| Tritanopia (no blue cones) | #006A7E | 0.146 |
| Achromatopsia (no color) | #595959 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374DBF
#374DBF
oklch(47.4% 0.18 269.8)
- #715900
#715900
oklch(47.5% 0.097 90.5)
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 #374DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Majorelle Blue #3F37C9 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Blurple #5539CC ΔE 0.057
- Warm Blue #4B57DB ΔE 0.057
- Bluey Purple #6241C7 ΔE 0.065
- Sapphire #2138AB ΔE 0.068
- Iris #6258C4 ΔE 0.069
Use #374DBF 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.