#1F34FF
Closest named color: Vivid Blue (#152EFF). oklch(49.1% 0.287 266.6), rgb(31, 52, 255).
Aa
White text reads best on this color (7.01:1).
About this color
#1F34FF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.287 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Blue (#152EFF), ΔE 0.012 away. White text reads best on it, at 7.01:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.287) |
| Temperature | cool |
| Nearest name | Vivid Blue (#152EFF) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #1F34FF |
| RGB | rgb(31, 52, 255) |
| HSL | hsl(234, 100%, 56%) |
| OKLCH | oklch(49.1% 0.287 266.6) |
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 #1F34FF | 7.01:1 | AAA | Lc -87.6 | Fine for body text |
| Black text on #1F34FF | 2.99:1 | Fails | Lc 21.5 | Dividers and decoration only |
| #1F34FF text on white | 7.01:1 | AAA | Lc 82.5 | Fine for body text |
| #1F34FF text on black | 2.99:1 | Fails | Lc -19.4 | 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 700.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#335DFF
oklch(55.7% 0.244 266.6)
-
Step 700
700 (this color)
#1F34FF
oklch(49.1% 0.287 266.6)
-
Step 800
800
#192FCE
oklch(42.8% 0.238 266.6)
-
Step 900
900
#162FA1
oklch(37.7% 0.184 266.5)
-
Step 950
950
#0D1E5E
oklch(27.1% 0.116 266.6)
#1F34FF 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) | #0064FF | 0.085 |
| Deuteranopia (no green cones) | #004DFC | 0.038 |
| Tritanopia (no blue cones) | #00759B | 0.215 |
| Achromatopsia (no color) | #595959 | 0.288 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F34FF
#1F34FF
oklch(49.1% 0.287 266.6)
- #7A5C00
#7A5C00
oklch(49.2% 0.101 86.4)
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 #1F34FF, closest first.
No curated palette has a color within ΔE 0.04 of #1F34FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Blue #152EFF ΔE 0.012
- Vibrant Blue #0339F8 ΔE 0.016
- Light Royal Blue #3A2EFE ΔE 0.025
- Rich Blue #021BF9 ΔE 0.039
- Electric Blue #0652FF ΔE 0.048
- Blue #0000FF ΔE 0.049
- Strong Blue #0C06F7 ΔE 0.050
- Primary Blue #0804F9 ΔE 0.050
Use #1F34FF 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.