#4F78EE
Closest named color: Cornflower (#6A79F7). oklch(60.5% 0.183 266.5), rgb(79, 120, 238).
Aa
Black text reads best on this color (5.25:1).
About this color
#4F78EE is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.183 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.035 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #4F78EE |
| RGB | rgb(79, 120, 238) |
| HSL | hsl(225, 82%, 62%) |
| OKLCH | oklch(60.5% 0.183 266.5) |
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 #4F78EE | 3.99:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #4F78EE | 5.25:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #4F78EE text on white | 3.99:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #4F78EE text on black | 5.25:1 | AA | Lc -34.7 | 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 500.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FB
oklch(81% 0.089 266)
-
Step 400
400
#779CFA
oklch(70.7% 0.144 266.5)
-
Step 500
500 (this color)
#4F78EE
oklch(60.5% 0.183 266.5)
-
Step 600
600
#3D66E6
oklch(55.6% 0.2 266.4)
-
Step 700
700
#3054C8
oklch(49.2% 0.185 266.4)
-
Step 800
800
#2845A2
oklch(42.7% 0.154 266.6)
-
Step 900
900
#243B80
oklch(37.6% 0.12 266.7)
-
Step 950
950
#15234B
oklch(26.9% 0.076 266.7)
#4F78EE 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) | #3487F2 | 0.040 |
| Deuteranopia (no green cones) | #0078EC | 0.044 |
| Tritanopia (no blue cones) | #0094A8 | 0.151 |
| Achromatopsia (no color) | #7F7F7F | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F78EE
#4F78EE
oklch(60.5% 0.183 266.5)
- #A27B00
#A27B00
oklch(60.4% 0.124 86.3)
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 #4F78EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.035
- Clear Blue #247AFD ΔE 0.037
- Royal Blue #4169E1 ΔE 0.046
- Soft Blue #6488EA ΔE 0.051
- Cerulean Blue #056EEE ΔE 0.056
- Neon Blue #4361EE ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.063
Use #4F78EE 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.