#426ADF
Closest named color: Royal Blue (#4169E1). oklch(56.1% 0.184 266.3), rgb(66, 106, 223).
Aa
White text reads best on this color (4.81:1).
About this color
#426ADF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.184 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.004 away. White text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.35:1 |
| White text | 4.81:1 |
Values
| HEX | #426ADF |
| RGB | rgb(66, 106, 223) |
| HSL | hsl(225, 71%, 57%) |
| OKLCH | oklch(56.1% 0.184 266.3) |
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 #426ADF | 4.81:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #426ADF | 4.35:1 | AA large text | Lc 31.1 | Non-text elements, placeholder text |
| #426ADF text on white | 4.81:1 | AA | Lc 73.0 | Content text, not long reading |
| #426ADF text on black | 4.35:1 | AA large text | Lc -28.7 | 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 600.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F7
oklch(80.9% 0.083 266.3)
-
Step 400
400
#7A9DF3
oklch(70.7% 0.132 266.3)
-
Step 500
500
#5982EF
oklch(63.1% 0.17 266.2)
-
Step 600
600 (this color)
#426ADF
oklch(56.1% 0.184 266.3)
-
Step 700
700
#3356C0
oklch(49.1% 0.171 266.3)
-
Step 800
800
#2A479B
oklch(42.6% 0.142 266.1)
-
Step 900
900
#263D7C
oklch(37.8% 0.111 266.1)
-
Step 950
950
#162448
oklch(26.9% 0.07 265.9)
#426ADF 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) | #1779E3 | 0.042 |
| Deuteranopia (no green cones) | #006BDD | 0.035 |
| Tritanopia (no blue cones) | #00869A | 0.148 |
| Achromatopsia (no color) | #727272 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #426ADF
#426ADF
oklch(56.1% 0.184 266.3)
- #926F00
#926F00
oklch(56.1% 0.115 86.6)
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 #426ADF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.004
- Neon Blue #4361EE ΔE 0.032
- Cerulean Blue #056EEE ΔE 0.038
- Warm Blue #4B57DB ΔE 0.044
- Azul #1D5DEC ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.051
- Clear Blue #247AFD ΔE 0.057
- Bright Blue #0165FC ΔE 0.058
Use #426ADF 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.