#1D72F8
Closest named color: Cerulean Blue (#056EEE). oklch(58.4% 0.215 260), rgb(29, 114, 248).
Aa
Black text reads best on this color (4.81:1).
About this color
#1D72F8 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.215 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.020 away. Black text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.215) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #1D72F8 |
| RGB | rgb(29, 114, 248) |
| HSL | hsl(217, 94%, 54%) |
| OKLCH | oklch(58.4% 0.215 260) |
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 #1D72F8 | 4.36:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #1D72F8 | 4.81:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #1D72F8 text on white | 4.36:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #1D72F8 text on black | 4.81:1 | AA | Lc -32.2 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3983FF
oklch(63.1% 0.199 260.2)
-
Step 600
600 (this color)
#1D72F8
oklch(58.4% 0.215 260)
-
Step 700
700
#0056CF
oklch(49.1% 0.2 260)
-
Step 800
800
#0847A7
oklch(42.6% 0.166 260.1)
-
Step 900
900
#113D85
oklch(37.7% 0.13 260.1)
-
Step 950
950
#0C254E
oklch(27.2% 0.082 259.9)
#1D72F8 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) | #0083FD | 0.041 |
| Deuteranopia (no green cones) | #0070F5 | 0.011 |
| Tritanopia (no blue cones) | #0094AA | 0.165 |
| Achromatopsia (no color) | #797979 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D72F8
#1D72F8
oklch(58.4% 0.215 260)
- #A17200
#A17200
oklch(58.5% 0.121 79.9)
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 #1D72F8, closest first.
No curated palette has a color within ΔE 0.04 of #1D72F8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.020
- Clear Blue #247AFD ΔE 0.022
- Bright Blue #0165FC ΔE 0.034
- Royal Blue #4169E1 ΔE 0.043
- Neon Blue #4361EE ΔE 0.044
- Azul #1D5DEC ΔE 0.053
- Cornflower #6A79F7 ΔE 0.073
- Electric Blue #0652FF ΔE 0.074
Use #1D72F8 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.