#6178BC
Closest named color: Cool Blue (#4984B8). oklch(58.5% 0.108 268.7), rgb(97, 120, 188).
Aa
Black text reads best on this color (4.92:1).
About this color
#6178BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.108 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.042 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #6178BC |
| RGB | rgb(97, 120, 188) |
| HSL | hsl(225, 40%, 56%) |
| OKLCH | oklch(58.5% 0.108 268.7) |
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 #6178BC | 4.26:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #6178BC | 4.92:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #6178BC text on white | 4.26:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #6178BC text on black | 4.92:1 | AA | Lc -32.3 | 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 600.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B3C0E1
oklch(80.9% 0.049 268.3)
-
Step 400
400
#8C9FD2
oklch(70.7% 0.078 268.6)
-
Step 500
500
#7087C6
oklch(63.2% 0.099 268.2)
-
Step 600
600 (this color)
#6178BC
oklch(58.5% 0.108 268.7)
-
Step 700
700
#495D9A
oklch(49.1% 0.101 268.8)
-
Step 800
800
#3C4C7D
oklch(42.7% 0.084 269)
-
Step 900
900
#334064
oklch(37.7% 0.064 268.1)
-
Step 950
950
#1E253B
oklch(26.9% 0.042 269.9)
#6178BC 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) | #5E7FBF | 0.019 |
| Deuteranopia (no green cones) | #5577BA | 0.016 |
| Tritanopia (no blue cones) | #3C8691 | 0.097 |
| Achromatopsia (no color) | #7A7A7A | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6178BC
#6178BC
oklch(58.5% 0.108 268.7)
- #96771F
#96771F
oklch(58.4% 0.108 88.1)
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 #6178BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.042
- Windows Blue #3778BF ΔE 0.043
- Off Blue #5684AE ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.051
- Flat Blue #3C73A8 ΔE 0.055
- French Blue #436BAD ΔE 0.057
- Faded Blue #658CBB ΔE 0.058
Use #6178BC 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.