#1271E5
Closest named color: Cerulean Blue (#056EEE). oklch(56.6% 0.194 257.4), rgb(18, 113, 229).
Aa
White text reads best on this color (4.64:1).
About this color
#1271E5 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.194 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.016 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.51:1 |
| White text | 4.64:1 |
Values
| HEX | #1271E5 |
| RGB | rgb(18, 113, 229) |
| HSL | hsl(213, 85%, 48%) |
| OKLCH | oklch(56.6% 0.194 257.4) |
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 #1271E5 | 4.64:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #1271E5 | 4.51:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #1271E5 text on white | 4.64:1 | AA | Lc 71.5 | Content text, not long reading |
| #1271E5 text on black | 4.51:1 | AA | Lc -30.1 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#66A1F6
oklch(70.6% 0.14 257.6)
-
Step 500
500
#3987F3
oklch(63.1% 0.179 257.5)
-
Step 600
600 (this color)
#1271E5
oklch(56.6% 0.194 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#054B9E
oklch(42.7% 0.149 257.3)
-
Step 900
900
#11407E
oklch(37.8% 0.116 257.2)
-
Step 950
950
#0C264A
oklch(27.1% 0.074 257.4)
#1271E5 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) | #207EE9 | 0.035 |
| Deuteranopia (no green cones) | #006CE3 | 0.015 |
| Tritanopia (no blue cones) | #008EA0 | 0.148 |
| Achromatopsia (no color) | #747474 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1271E5
#1271E5
oklch(56.6% 0.194 257.4)
- #9C6B00
#9C6B00
oklch(56.5% 0.118 77.2)
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 #1271E5, closest first.
No curated palette has a color within ΔE 0.04 of #1271E5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.016
- Royal Blue #4169E1 ΔE 0.031
- Clear Blue #247AFD ΔE 0.044
- Bright Blue #0165FC ΔE 0.046
- Neon Blue #4361EE ΔE 0.047
- Azul #1D5DEC ΔE 0.049
- Windows Blue #3778BF ΔE 0.067
- Warm Blue #4B57DB ΔE 0.068
Use #1271E5 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.