#1D43EC
Closest named color: Vibrant Blue (#0339F8). oklch(49% 0.253 265.8), rgb(29, 67, 236).
Aa
White text reads best on this color (6.84:1).
About this color
#1D43EC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.253 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Vibrant Blue (#0339F8), ΔE 0.027 away. White text reads best on it, at 6.84:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.253) |
| Temperature | cool |
| Nearest name | Vibrant Blue (#0339F8) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #1D43EC |
| RGB | rgb(29, 67, 236) |
| HSL | hsl(229, 84%, 52%) |
| OKLCH | oklch(49% 0.253 265.8) |
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 #1D43EC | 6.84:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #1D43EC | 3.06:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #1D43EC text on white | 6.84:1 | AA | Lc 82.4 | Fine for body text |
| #1D43EC text on black | 3.06:1 | AA large text | Lc -19.5 | 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 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
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#507FFF
oklch(63.1% 0.197 265.8)
-
Step 600
600
#2E5DFF
oklch(55.5% 0.245 265.8)
-
Step 700
700 (this color)
#1D43EC
oklch(49% 0.253 265.8)
-
Step 800
800
#183ABF
oklch(42.8% 0.209 265.7)
-
Step 900
900
#183596
oklch(37.8% 0.162 265.7)
-
Step 950
950
#0E2058
oklch(27% 0.104 265.9)
#1D43EC 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) | #0064F1 | 0.068 |
| Deuteranopia (no green cones) | #0050E9 | 0.024 |
| Tritanopia (no blue cones) | #007493 | 0.192 |
| Achromatopsia (no color) | #5A5A5A | 0.254 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D43EC
#1D43EC
oklch(49% 0.253 265.8)
- #7A5B00
#7A5B00
oklch(49% 0.1 85.4)
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 #1D43EC, closest first.
No curated palette has a color within ΔE 0.04 of #1D43EC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vibrant Blue #0339F8 ΔE 0.027
- Vivid Blue #152EFF ΔE 0.040
- Light Royal Blue #3A2EFE ΔE 0.041
- Electric Blue #0652FF ΔE 0.042
- Azul #1D5DEC ΔE 0.054
- Rich Blue #021BF9 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.058
- Strong Blue #0C06F7 ΔE 0.067
Use #1D43EC 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.