#1C71EB
Closest named color: Cerulean Blue (#056EEE). oklch(57.2% 0.2 258.9), rgb(28, 113, 235).
Aa
Black text reads best on this color (4.61:1).
About this color
#1C71EB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.200 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.012 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.61:1 |
| White text | 4.55:1 |
Values
| HEX | #1C71EB |
| RGB | rgb(28, 113, 235) |
| HSL | hsl(215, 84%, 52%) |
| OKLCH | oklch(57.2% 0.2 258.9) |
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 #1C71EB | 4.55:1 | AA | Lc -76.4 | Fine for body text |
| Black text on #1C71EB | 4.61:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #1C71EB text on white | 4.55:1 | AA | Lc 70.9 | Content text, not long reading |
| #1C71EB text on black | 4.61:1 | AA | Lc -30.7 | 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
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9DC2FB
oklch(80.8% 0.091 258.9)
-
Step 400
400
#67A0F9
oklch(70.6% 0.144 259)
-
Step 500
500
#3C86F6
oklch(63.2% 0.183 258.7)
-
Step 600
600 (this color)
#1C71EB
oklch(57.2% 0.2 258.9)
-
Step 700
700
#0459C7
oklch(49.1% 0.186 258.9)
-
Step 800
800
#0B4AA1
oklch(42.8% 0.153 258.7)
-
Step 900
900
#133F80
oklch(37.8% 0.12 258.7)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#1C71EB 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) | #107FEF | 0.035 |
| Deuteranopia (no green cones) | #006DE9 | 0.014 |
| Tritanopia (no blue cones) | #008FA3 | 0.152 |
| Achromatopsia (no color) | #767676 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C71EB
#1C71EB
oklch(57.2% 0.2 258.9)
- #9D6E00
#9D6E00
oklch(57.2% 0.119 79)
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 #1C71EB, closest first.
No curated palette has a color within ΔE 0.04 of #1C71EB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.012
- Royal Blue #4169E1 ΔE 0.031
- Clear Blue #247AFD ΔE 0.035
- Bright Blue #0165FC ΔE 0.041
- Neon Blue #4361EE ΔE 0.042
- Azul #1D5DEC ΔE 0.048
- Warm Blue #4B57DB ΔE 0.068
- Windows Blue #3778BF ΔE 0.074
Use #1C71EB 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.