#618BCB
Closest named color: Faded Blue (#658CBB). oklch(63.4% 0.108 258.6), rgb(97, 139, 203).
Aa
Black text reads best on this color (6.06:1).
About this color
#618BCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.108 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.026 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #618BCB |
| RGB | rgb(97, 139, 203) |
| HSL | hsl(216, 50%, 59%) |
| OKLCH | oklch(63.4% 0.108 258.6) |
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 #618BCB | 3.46:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #618BCB | 6.06:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #618BCB text on white | 3.46:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #618BCB text on black | 6.06:1 | AA | Lc -39.6 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ACC2E3
oklch(80.8% 0.053 258.4)
-
Step 400
400
#80A2D5
oklch(70.6% 0.084 258.3)
-
Step 500
500 (this color)
#618BCB
oklch(63.4% 0.108 258.6)
-
Step 600
600
#4773B7
oklch(55.6% 0.117 258.8)
-
Step 700
700
#38609E
oklch(49.1% 0.11 258.9)
-
Step 800
800
#2F4F80
oklch(42.8% 0.09 258.7)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273C
oklch(27.1% 0.044 258.3)
#618BCB 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) | #728FCE | 0.024 |
| Deuteranopia (no green cones) | #6585CA | 0.016 |
| Tritanopia (no blue cones) | #2A99A2 | 0.096 |
| Achromatopsia (no color) | #8A8A8A | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618BCB
#618BCB
oklch(63.4% 0.108 258.6)
- #AD8234
#AD8234
oklch(63.4% 0.108 79.3)
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 #618BCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.043
- Cool Blue #4984B8 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.047
- Off Blue #5684AE ΔE 0.048
- Soft Blue #6488EA ΔE 0.050
- Steel Blue #4682B4 ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.054
Use #618BCB 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.