#618EFF
Closest named color: Soft Blue (#6488EA). oklch(66.9% 0.174 265.6), rgb(97, 142, 255).
Aa
Black text reads best on this color (6.82:1).
About this color
#618EFF is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.174 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.032 away. Black text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #618EFF |
| RGB | rgb(97, 142, 255) |
| HSL | hsl(223, 100%, 69%) |
| OKLCH | oklch(66.9% 0.174 265.6) |
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 #618EFF | 3.07:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #618EFF | 6.82:1 | AA | Lc 46.6 | Large or bold text, headings |
| #618EFF text on white | 3.07:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #618EFF text on black | 6.82:1 | AA | Lc -44.3 | 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 400.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400 (this color)
#618EFF
oklch(66.9% 0.174 265.6)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#2E5EFE
oklch(55.6% 0.243 265.6)
-
Step 700
700
#224CDD
oklch(49.1% 0.225 265.5)
-
Step 800
800
#1D40B3
oklch(42.8% 0.186 265.5)
-
Step 900
900
#1C388D
oklch(37.7% 0.145 265.7)
-
Step 950
950
#102253
oklch(27% 0.093 265.4)
#618EFF 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) | #589BFF | 0.033 |
| Deuteranopia (no green cones) | #3E8CFD | 0.032 |
| Tritanopia (no blue cones) | #00A8BA | 0.148 |
| Achromatopsia (no color) | #939393 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618EFF
#618EFF
oklch(66.9% 0.174 265.6)
- #BB8D00
#BB8D00
oklch(66.9% 0.137 85.3)
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 #618EFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.032
- Cornflower Blue #6495ED ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.050
- Cornflower #6A79F7 ΔE 0.051
- Lavender Blue #8B88F8 ΔE 0.052
- Periwinkle #8E82FE ΔE 0.060
Use #618EFF 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.