#2A73DF
Closest named color: Royal Blue (#4169E1). oklch(57.1% 0.18 258.7), rgb(42, 115, 223).
Aa
Black text reads best on this color (4.61:1).
About this color
#2A73DF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.180 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.028 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #2A73DF |
| RGB | rgb(42, 115, 223) |
| HSL | hsl(216, 74%, 52%) |
| OKLCH | oklch(57.1% 0.18 258.7) |
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 #2A73DF | 4.54:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #2A73DF | 4.61:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #2A73DF text on white | 4.54:1 | AA | Lc 71.1 | Content text, not long reading |
| #2A73DF text on black | 4.61:1 | AA | Lc -30.6 | 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
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400
#6DA1F1
oklch(70.7% 0.13 258.7)
-
Step 500
500
#4587EC
oklch(63.1% 0.166 258.8)
-
Step 600
600 (this color)
#2A73DF
oklch(57.1% 0.18 258.7)
-
Step 700
700
#175CBD
oklch(49.2% 0.167 258.5)
-
Step 800
800
#164B99
oklch(42.6% 0.139 258.8)
-
Step 900
900
#19407A
oklch(37.8% 0.108 258.5)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#2A73DF 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) | #337FE3 | 0.033 |
| Deuteranopia (no green cones) | #006EDD | 0.022 |
| Tritanopia (no blue cones) | #008D9E | 0.138 |
| Achromatopsia (no color) | #767676 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A73DF
#2A73DF
oklch(57.1% 0.18 258.7)
- #9D6D00
#9D6D00
oklch(57% 0.119 78.2)
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 #2A73DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.028
- Cerulean Blue #056EEE ΔE 0.031
- Clear Blue #247AFD ΔE 0.047
- Neon Blue #4361EE ΔE 0.051
- Windows Blue #3778BF ΔE 0.054
- Bright Blue #0165FC ΔE 0.060
- Azul #1D5DEC ΔE 0.060
- Water Blue #0E87CC ΔE 0.065
Use #2A73DF 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.