#618BD3
Closest named color: Dark Sky Blue (#448EE4). oklch(63.8% 0.118 260.7), rgb(97, 139, 211).
Aa
Black text reads best on this color (6.14:1).
About this color
#618BD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.118 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.034 away. Black text reads best on it, at 6.14:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.14:1 |
| White text | 3.41:1 |
Values
| HEX | #618BD3 |
| RGB | rgb(97, 139, 211) |
| HSL | hsl(218, 56%, 60%) |
| OKLCH | oklch(63.8% 0.118 260.7) |
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 #618BD3 | 3.41:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #618BD3 | 6.14:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #618BD3 text on white | 3.41:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #618BD3 text on black | 6.14:1 | AA | Lc -40.1 | 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 500.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ACC2E7
oklch(81% 0.058 260.8)
-
Step 400
400
#7FA1DB
oklch(70.6% 0.094 260.8)
-
Step 500
500 (this color)
#618BD3
oklch(63.8% 0.118 260.7)
-
Step 600
600
#4672BE
oklch(55.7% 0.128 260.6)
-
Step 700
700
#375FA4
oklch(49.2% 0.12 260.6)
-
Step 800
800
#2E4E85
oklch(42.8% 0.099 260.5)
-
Step 900
900
#29416A
oklch(37.7% 0.077 260.5)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#618BD3 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) | #6E91D6 | 0.024 |
| Deuteranopia (no green cones) | #6086D1 | 0.014 |
| Tritanopia (no blue cones) | #1F9BA5 | 0.106 |
| Achromatopsia (no color) | #8B8B8B | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618BD3
#618BD3
oklch(63.8% 0.118 260.7)
- #B08326
#B08326
oklch(63.8% 0.118 81)
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 #618BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.034
- Soft Blue #6488EA ΔE 0.038
- Faded Blue #658CBB ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.047
- Cool Blue #4984B8 ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.059
- Off Blue #5684AE ΔE 0.059
Use #618BD3 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.