#1B5CDE
Closest named color: Azul (#1D5DEC). oklch(51.9% 0.209 262.1), rgb(27, 92, 222).
Aa
White text reads best on this color (5.78:1).
About this color
#1B5CDE is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.209 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.022 away. White text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.209) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.63:1 |
| White text | 5.78:1 |
Values
| HEX | #1B5CDE |
| RGB | rgb(27, 92, 222) |
| HSL | hsl(220, 78%, 49%) |
| OKLCH | oklch(51.9% 0.209 262.1) |
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 #1B5CDE | 5.78:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #1B5CDE | 3.63:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #1B5CDE text on white | 5.78:1 | AA | Lc 78.1 | Fine for body text |
| #1B5CDE text on black | 3.63:1 | AA large text | Lc -23.6 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500
#4282FF
oklch(63.2% 0.198 262)
-
Step 600
600
#1E65F4
oklch(55.6% 0.225 262.2)
-
Step 700
700 (this color)
#1B5CDE
oklch(51.9% 0.209 262.1)
-
Step 800
800
#1145AB
oklch(42.7% 0.172 262)
-
Step 900
900
#153C88
oklch(37.8% 0.135 261.9)
-
Step 950
950
#0E244F
oklch(27.1% 0.084 262)
#1B5CDE 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) | #006FE2 | 0.046 |
| Deuteranopia (no green cones) | #005DDC | 0.009 |
| Tritanopia (no blue cones) | #007D94 | 0.159 |
| Achromatopsia (no color) | #666666 | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5CDE
#1B5CDE
oklch(51.9% 0.209 262.1)
- #876100
#876100
oklch(51.8% 0.107 81.8)
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 #1B5CDE, closest first.
No curated palette has a color within ΔE 0.04 of #1B5CDE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.022
- Warm Blue #4B57DB ΔE 0.042
- Neon Blue #4361EE ΔE 0.045
- Royal Blue #4169E1 ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.048
- Bright Blue #0165FC ΔE 0.050
- Electric Blue #0652FF ΔE 0.054
- Blue Blue #2242C7 ΔE 0.069
Use #1B5CDE 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.