#4D71CF
Closest named color: Royal Blue (#4169E1). oklch(56.9% 0.15 266), rgb(77, 113, 207).
Aa
White text reads best on this color (4.58:1).
About this color
#4D71CF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.150 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.039 away. White text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #4D71CF |
| RGB | rgb(77, 113, 207) |
| HSL | hsl(223, 58%, 56%) |
| OKLCH | oklch(56.9% 0.15 266) |
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 #4D71CF | 4.58:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #4D71CF | 4.57:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #4D71CF text on white | 4.58:1 | AA | Lc 71.6 | Content text, not long reading |
| #4D71CF text on black | 4.57:1 | AA | Lc -30.1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ACC0ED
oklch(80.8% 0.068 266.1)
-
Step 400
400
#819FE5
oklch(70.8% 0.108 266)
-
Step 500
500
#6285DD
oklch(63.1% 0.139 266.2)
-
Step 600
600 (this color)
#4D71CF
oklch(56.9% 0.15 266)
-
Step 700
700
#3B5AAF
oklch(49% 0.14 266.3)
-
Step 800
800
#314A8E
oklch(42.7% 0.116 266.4)
-
Step 900
900
#2B3F71
oklch(37.8% 0.089 265.9)
-
Step 950
950
#192542
oklch(27% 0.057 265.8)
#4D71CF 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) | #447CD3 | 0.029 |
| Deuteranopia (no green cones) | #2E70CD | 0.029 |
| Tritanopia (no blue cones) | #008696 | 0.127 |
| Achromatopsia (no color) | #757575 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D71CF
#4D71CF
oklch(56.9% 0.15 266)
- #967100
#967100
oklch(57% 0.117 85.7)
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 #4D71CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.039
- Windows Blue #3778BF ΔE 0.039
- Dark Periwinkle #665FD1 ΔE 0.052
- French Blue #436BAD ΔE 0.056
- Mid Blue #276AB3 ΔE 0.061
- Slate Blue #6A5ACD ΔE 0.064
- Cerulean Blue #056EEE ΔE 0.064
- Iris #6258C4 ΔE 0.065
Use #4D71CF 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.