#618FAB
Closest named color: Blue Grey (#758DA3). oklch(62.8% 0.065 236), rgb(97, 143, 171).
Aa
Black text reads best on this color (6.02:1).
About this color
#618FAB is a medium-light, muted blue. In OKLCH its lightness is 63%, its chroma 0.065 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.025 away. Black text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.02:1 |
| White text | 3.48:1 |
Values
| HEX | #618FAB |
| RGB | rgb(97, 143, 171) |
| HSL | hsl(203, 31%, 53%) |
| OKLCH | oklch(62.8% 0.065 236) |
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 #618FAB | 3.48:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #618FAB | 6.02:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #618FAB text on white | 3.48:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #618FAB text on black | 6.02:1 | AA | Lc -39.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D3
oklch(80.8% 0.032 237.7)
-
Step 400
400
#82A6BD
oklch(70.7% 0.052 236.5)
-
Step 500
500 (this color)
#618FAB
oklch(62.8% 0.065 236)
-
Step 600
600
#487A98
oklch(55.7% 0.071 236.4)
-
Step 700
700
#396781
oklch(49.2% 0.066 235)
-
Step 800
800
#305469
oklch(42.8% 0.054 235.6)
-
Step 900
900
#2B4555
oklch(37.6% 0.042 236.5)
-
Step 950
950
#192932
oklch(27.1% 0.027 233.8)
#618FAB 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) | #828EAC | 0.041 |
| Deuteranopia (no green cones) | #7886AB | 0.036 |
| Tritanopia (no blue cones) | #439698 | 0.050 |
| Achromatopsia (no color) | #898989 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618FAB
#618FAB
oklch(62.8% 0.065 236)
- #A87E62
#A87E62
oklch(62.7% 0.066 54.9)
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 #618FAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.025
- Silver Lake Blue #778DA9 ΔE 0.026
- Faded Blue #658CBB ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.029
- Light Slate Gray #778899 ΔE 0.036
- Off Blue #5684AE ΔE 0.037
- Steel #738595 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.050
Use #618FAB 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.