#1F72EF
Closest named color: Cerulean Blue (#056EEE). oklch(57.8% 0.204 259.4), rgb(31, 114, 239).
Aa
Black text reads best on this color (4.71:1).
About this color
#1F72EF is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.204 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.014 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #1F72EF |
| RGB | rgb(31, 114, 239) |
| HSL | hsl(216, 87%, 53%) |
| OKLCH | oklch(57.8% 0.204 259.4) |
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 #1F72EF | 4.45:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #1F72EF | 4.71:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #1F72EF text on white | 4.45:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #1F72EF text on black | 4.71:1 | AA | Lc -31.4 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFC
oklch(88.6% 0.051 259.4)
-
Step 300
300
#9DC2FC
oklch(80.8% 0.092 259.2)
-
Step 400
400
#67A0FB
oklch(70.7% 0.147 259.4)
-
Step 500
500
#3C85F8
oklch(63.1% 0.187 259.3)
-
Step 600
600 (this color)
#1F72EF
oklch(57.8% 0.204 259.4)
-
Step 700
700
#0558C9
oklch(49% 0.19 259.4)
-
Step 800
800
#0B49A3
oklch(42.7% 0.157 259.3)
-
Step 900
900
#133E81
oklch(37.6% 0.123 259.4)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#1F72EF 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) | #0881F3 | 0.037 |
| Deuteranopia (no green cones) | #006FED | 0.013 |
| Tritanopia (no blue cones) | #0091A5 | 0.156 |
| Achromatopsia (no color) | #777777 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F72EF
#1F72EF
oklch(57.8% 0.204 259.4)
- #9F7000
#9F7000
oklch(57.8% 0.12 79.5)
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 #1F72EF, closest first.
No curated palette has a color within ΔE 0.04 of #1F72EF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.014
- Clear Blue #247AFD ΔE 0.029
- Royal Blue #4169E1 ΔE 0.034
- Bright Blue #0165FC ΔE 0.040
- Neon Blue #4361EE ΔE 0.043
- Azul #1D5DEC ΔE 0.051
- Warm Blue #4B57DB ΔE 0.071
- Cornflower #6A79F7 ΔE 0.074
Use #1F72EF 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.