#2B74DE
Closest named color: Royal Blue (#4169E1). oklch(57.2% 0.177 258.4), rgb(43, 116, 222).
Aa
Black text reads best on this color (4.65:1).
About this color
#2B74DE is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.177 and its hue 258°. 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 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.65:1 |
| White text | 4.51:1 |
Values
| HEX | #2B74DE |
| RGB | rgb(43, 116, 222) |
| HSL | hsl(216, 73%, 52%) |
| OKLCH | oklch(57.2% 0.177 258.4) |
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 #2B74DE | 4.51:1 | AA | Lc -76.3 | Fine for body text |
| Black text on #2B74DE | 4.65:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #2B74DE text on white | 4.51:1 | AA | Lc 70.8 | Content text, not long reading |
| #2B74DE text on black | 4.65:1 | AA | Lc -30.9 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A1C2F4
oklch(80.8% 0.08 258.6)
-
Step 400
400
#6EA1EF
oklch(70.6% 0.127 258.6)
-
Step 500
500
#4688EA
oklch(63.2% 0.162 258.3)
-
Step 600
600 (this color)
#2B74DE
oklch(57.2% 0.177 258.4)
-
Step 700
700
#185CBC
oklch(49.1% 0.165 258.5)
-
Step 800
800
#174C98
oklch(42.8% 0.136 258.4)
-
Step 900
900
#1A4079
oklch(37.7% 0.106 258.6)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#2B74DE 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) | #377FE2 | 0.032 |
| Deuteranopia (no green cones) | #006FDC | 0.023 |
| Tritanopia (no blue cones) | #008E9E | 0.137 |
| Achromatopsia (no color) | #767676 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B74DE
#2B74DE
oklch(57.2% 0.177 258.4)
- #9E6E00
#9E6E00
oklch(57.3% 0.119 78.4)
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 #2B74DE, 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 0.034
- Clear Blue #247AFD ΔE 0.048
- Windows Blue #3778BF ΔE 0.051
- Neon Blue #4361EE ΔE 0.054
- Water Blue #0E87CC ΔE 0.062
- Bright Blue #0165FC ΔE 0.063
- Azul #1D5DEC ΔE 0.063
Use #2B74DE 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.