#5978DB
Closest named color: Cornflower (#6A79F7). oklch(59.8% 0.155 268.4), rgb(89, 120, 219).
Aa
Black text reads best on this color (5.13:1).
About this color
#5978DB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.155 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.048 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.13:1 |
| White text | 4.09:1 |
Values
| HEX | #5978DB |
| RGB | rgb(89, 120, 219) |
| HSL | hsl(226, 64%, 60%) |
| OKLCH | oklch(59.8% 0.155 268.4) |
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 #5978DB | 4.09:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #5978DB | 5.13:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #5978DB text on white | 4.09:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #5978DB text on black | 5.13:1 | AA | Lc -33.8 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#ACBFF2
oklch(80.8% 0.075 268.8)
-
Step 400
400
#819DEC
oklch(70.7% 0.12 268.4)
-
Step 500
500 (this color)
#5978DB
oklch(59.8% 0.155 268.4)
-
Step 600
600
#4A69D4
oklch(55.5% 0.168 268.3)
-
Step 700
700
#3C57B8
oklch(49.1% 0.156 268.4)
-
Step 800
800
#324895
oklch(42.8% 0.129 268.5)
-
Step 900
900
#2B3D77
oklch(37.7% 0.101 268.3)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#5978DB 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) | #4A84DF | 0.032 |
| Deuteranopia (no green cones) | #3678D9 | 0.034 |
| Tritanopia (no blue cones) | #008E9F | 0.134 |
| Achromatopsia (no color) | #7D7D7D | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5978DB
#5978DB
oklch(59.8% 0.155 268.4)
- #9E7A00
#9E7A00
oklch(59.8% 0.122 87.9)
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 #5978DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.048
- Soft Blue #6488EA ΔE 0.048
- Royal Blue #4169E1 ΔE 0.051
- Windows Blue #3778BF ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.062
- Clear Blue #247AFD ΔE 0.064
- Medium Slate Blue #7B68EE ΔE 0.065
Use #5978DB 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.