#4F78EF
Closest named color: Cornflower (#6A79F7). oklch(60.6% 0.185 266.6), rgb(79, 120, 239).
Aa
Black text reads best on this color (5.26:1).
About this color
#4F78EF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.185 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.034 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #4F78EF |
| RGB | rgb(79, 120, 239) |
| HSL | hsl(225, 83%, 62%) |
| OKLCH | oklch(60.6% 0.185 266.6) |
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 #4F78EF | 3.98:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #4F78EF | 5.26:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #4F78EF text on white | 3.98:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #4F78EF text on black | 5.26:1 | AA | Lc -34.8 | 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
#A6C0FC
oklch(81% 0.09 266.3)
-
Step 400
400
#779CFA
oklch(70.7% 0.144 266.5)
-
Step 500
500 (this color)
#4F78EF
oklch(60.6% 0.185 266.6)
-
Step 600
600
#3D66E7
oklch(55.7% 0.201 266.4)
-
Step 700
700
#3053C9
oklch(49.1% 0.188 266.6)
-
Step 800
800
#2845A2
oklch(42.7% 0.154 266.6)
-
Step 900
900
#243B81
oklch(37.7% 0.122 266.8)
-
Step 950
950
#15234B
oklch(26.9% 0.076 266.7)
#4F78EF 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) | #3387F3 | 0.040 |
| Deuteranopia (no green cones) | #0078ED | 0.044 |
| Tritanopia (no blue cones) | #0094A8 | 0.152 |
| Achromatopsia (no color) | #7F7F7F | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F78EF
#4F78EF
oklch(60.6% 0.185 266.6)
- #A27C00
#A27C00
oklch(60.7% 0.124 87)
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 #4F78EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.034
- Clear Blue #247AFD ΔE 0.036
- Royal Blue #4169E1 ΔE 0.046
- Soft Blue #6488EA ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.056
- Neon Blue #4361EE ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.062
- Medium Slate Blue #7B68EE ΔE 0.063
Use #4F78EF 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.