#1F70DF
Closest named color: Cerulean Blue (#056EEE). oklch(56.2% 0.186 258.1), rgb(31, 112, 223).
Aa
White text reads best on this color (4.72:1).
About this color
#1F70DF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.186 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.025 away. White text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.44:1 |
| White text | 4.72:1 |
Values
| HEX | #1F70DF |
| RGB | rgb(31, 112, 223) |
| HSL | hsl(215, 76%, 50%) |
| OKLCH | oklch(56.2% 0.186 258.1) |
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 #1F70DF | 4.72:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #1F70DF | 4.44:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #1F70DF text on white | 4.72:1 | AA | Lc 72.2 | Content text, not long reading |
| #1F70DF text on black | 4.44:1 | AA large text | Lc -29.5 | Dividers and decoration only |
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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#9FC3F7
oklch(81% 0.084 257.5)
-
Step 400
400
#6AA1F3
oklch(70.6% 0.134 258.2)
-
Step 500
500
#4087EF
oklch(63.1% 0.172 258.2)
-
Step 600
600 (this color)
#1F70DF
oklch(56.2% 0.186 258.1)
-
Step 700
700
#0E5BC0
oklch(49% 0.173 258.2)
-
Step 800
800
#104B9B
oklch(42.6% 0.143 258.1)
-
Step 900
900
#16407B
oklch(37.7% 0.111 257.8)
-
Step 950
950
#0E2648
oklch(27% 0.07 257.6)
#1F70DF 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) | #287CE3 | 0.033 |
| Deuteranopia (no green cones) | #006BDD | 0.018 |
| Tritanopia (no blue cones) | #008B9D | 0.141 |
| Achromatopsia (no color) | #737373 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F70DF
#1F70DF
oklch(56.2% 0.186 258.1)
- #9A6B00
#9A6B00
oklch(56.2% 0.117 78.3)
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 #1F70DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.025
- Royal Blue #4169E1 ΔE 0.027
- Neon Blue #4361EE ΔE 0.048
- Clear Blue #247AFD ΔE 0.051
- Azul #1D5DEC ΔE 0.051
- Bright Blue #0165FC ΔE 0.054
- Windows Blue #3778BF ΔE 0.059
- Warm Blue #4B57DB ΔE 0.064
Use #1F70DF 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.