#618CD0
Closest named color: Faded Blue (#658CBB). oklch(63.8% 0.113 259.3), rgb(97, 140, 208).
Aa
Black text reads best on this color (6.17:1).
About this color
#618CD0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.113 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.032 away. Black text reads best on it, at 6.17:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.17:1 |
| White text | 3.40:1 |
Values
| HEX | #618CD0 |
| RGB | rgb(97, 140, 208) |
| HSL | hsl(217, 54%, 60%) |
| OKLCH | oklch(63.8% 0.113 259.3) |
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 #618CD0 | 3.40:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #618CD0 | 6.17:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #618CD0 text on white | 3.40:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #618CD0 text on black | 6.17:1 | AA | Lc -40.3 | 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 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
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ACC2E5
oklch(80.9% 0.055 259.6)
-
Step 400
400
#7FA2D8
oklch(70.7% 0.089 258.9)
-
Step 500
500 (this color)
#618CD0
oklch(63.8% 0.113 259.3)
-
Step 600
600
#4573BB
oklch(55.7% 0.123 259)
-
Step 700
700
#3760A1
oklch(49.2% 0.114 259.3)
-
Step 800
800
#2E4E82
oklch(42.6% 0.095 259.7)
-
Step 900
900
#294169
oklch(37.6% 0.075 260.1)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#618CD0 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) | #7191D3 | 0.025 |
| Deuteranopia (no green cones) | #6386CF | 0.016 |
| Tritanopia (no blue cones) | #239BA4 | 0.102 |
| Achromatopsia (no color) | #8B8B8B | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618CD0
#618CD0
oklch(63.8% 0.113 259.3)
- #B0832E
#B0832E
oklch(63.9% 0.114 79.7)
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 #618CD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.038
- Soft Blue #6488EA ΔE 0.043
- Cornflower Blue #6495ED ΔE 0.046
- Cool Blue #4984B8 ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.054
- Off Blue #5684AE ΔE 0.055
Use #618CD0 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.