#247FDA
Closest named color: Water Blue (#0E87CC). oklch(59.2% 0.161 252.7), rgb(36, 127, 218).
Aa
Black text reads best on this color (5.12:1).
About this color
#247FDA is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.161 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.034 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #247FDA |
| RGB | rgb(36, 127, 218) |
| HSL | hsl(210, 72%, 50%) |
| OKLCH | oklch(59.2% 0.161 252.7) |
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 #247FDA | 4.09:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #247FDA | 5.12:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #247FDA text on white | 4.09:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #247FDA text on black | 5.12:1 | AA | Lc -34.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#6AA4E7
oklch(70.7% 0.116 252.9)
-
Step 500
500
#3D8CE0
oklch(63.1% 0.148 252.5)
-
Step 600
600 (this color)
#247FDA
oklch(59.2% 0.161 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#094F90
oklch(42.6% 0.124 252.7)
-
Step 900
900
#144273
oklch(37.6% 0.097 253.1)
-
Step 950
950
#0D2743
oklch(26.9% 0.061 252.5)
#247FDA 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) | #5186DE | 0.042 |
| Deuteranopia (no green cones) | #3076D8 | 0.023 |
| Tritanopia (no blue cones) | #0095A2 | 0.120 |
| Achromatopsia (no color) | #7D7D7D | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #247FDA
#247FDA
oklch(59.2% 0.161 252.7)
- #AB7000
#AB7000
oklch(59.3% 0.126 72.9)
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 #247FDA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.034
- Windows Blue #3778BF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.050
- Clear Blue #247AFD ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.058
- Royal Blue #4169E1 ΔE 0.059
- Cool Blue #4984B8 ΔE 0.062
- Steel Blue #4682B4 ΔE 0.064
Use #247FDA 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.