#2978F0
Closest named color: Clear Blue (#247AFD). oklch(59.3% 0.196 259.2), rgb(41, 120, 240).
Aa
Black text reads best on this color (5.03:1).
About this color
#2978F0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.196 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.020 away. Black text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.196) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.03:1 |
| White text | 4.16:1 |
Values
| HEX | #2978F0 |
| RGB | rgb(41, 120, 240) |
| HSL | hsl(216, 87%, 55%) |
| OKLCH | oklch(59.3% 0.196 259.2) |
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 #2978F0 | 4.16:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #2978F0 | 5.03:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #2978F0 text on white | 4.16:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #2978F0 text on black | 5.03:1 | AA | Lc -33.6 | 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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9FC2FA
oklch(80.9% 0.088 259.7)
-
Step 400
400
#69A0F8
oklch(70.6% 0.142 259.4)
-
Step 500
500
#3F86F4
oklch(63.1% 0.18 259)
-
Step 600
600 (this color)
#2978F0
oklch(59.3% 0.196 259.2)
-
Step 700
700
#0C59C5
oklch(49% 0.182 259.2)
-
Step 800
800
#0F4AA0
oklch(42.8% 0.151 259.1)
-
Step 900
900
#153F7F
oklch(37.8% 0.118 259)
-
Step 950
950
#0E254A
oklch(26.9% 0.075 259.5)
#2978F0 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) | #2986F4 | 0.036 |
| Deuteranopia (no green cones) | #0074EE | 0.019 |
| Tritanopia (no blue cones) | #0095A9 | 0.149 |
| Achromatopsia (no color) | #7C7C7C | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2978F0
#2978F0
oklch(59.3% 0.196 259.2)
- #A57400
#A57400
oklch(59.4% 0.123 79.2)
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 #2978F0, closest first.
No curated palette has a color within ΔE 0.04 of #2978F0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.020
- Cerulean Blue #056EEE ΔE 0.031
- Royal Blue #4169E1 ΔE 0.042
- Neon Blue #4361EE ΔE 0.054
- Bright Blue #0165FC ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.063
- Cornflower #6A79F7 ΔE 0.063
- Azul #1D5DEC ΔE 0.067
Use #2978F0 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.