#3C74DB
Closest named color: Royal Blue (#4169E1). oklch(57.6% 0.169 261.3), rgb(60, 116, 219).
Aa
Black text reads best on this color (4.71:1).
About this color
#3C74DB is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.169 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.030 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #3C74DB |
| RGB | rgb(60, 116, 219) |
| HSL | hsl(219, 69%, 55%) |
| OKLCH | oklch(57.6% 0.169 261.3) |
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 #3C74DB | 4.45:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #3C74DB | 4.71:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #3C74DB text on white | 4.45:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #3C74DB text on black | 4.71:1 | AA | Lc -31.1 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#75A0EC
oklch(70.6% 0.122 261.3)
-
Step 500
500
#5286E6
oklch(63% 0.155 261.6)
-
Step 600
600 (this color)
#3C74DB
oklch(57.6% 0.169 261.3)
-
Step 700
700
#295BB8
oklch(49.1% 0.157 261.4)
-
Step 800
800
#234B95
oklch(42.7% 0.13 261.4)
-
Step 900
900
#213F77
oklch(37.7% 0.102 261.6)
-
Step 950
950
#142545
oklch(26.9% 0.064 261.9)
#3C74DB 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) | #3C7FDF | 0.029 |
| Deuteranopia (no green cones) | #1171D9 | 0.028 |
| Tritanopia (no blue cones) | #008C9D | 0.133 |
| Achromatopsia (no color) | #777777 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C74DB
#3C74DB
oklch(57.6% 0.169 261.3)
- #9C7000
#9C7000
oklch(57.5% 0.119 81.2)
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 #3C74DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.030
- Cerulean Blue #056EEE ΔE 0.044
- Windows Blue #3778BF ΔE 0.047
- Clear Blue #247AFD ΔE 0.052
- Neon Blue #4361EE ΔE 0.056
- Water Blue #0E87CC ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.065
- Cornflower #6A79F7 ΔE 0.069
Use #3C74DB 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.