#1F5BDC
Closest named color: Azul (#1D5DEC). oklch(51.7% 0.207 262.7), rgb(31, 91, 220).
Aa
White text reads best on this color (5.85:1).
About this color
#1F5BDC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.207 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.025 away. White text reads best on it, at 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #1F5BDC |
| RGB | rgb(31, 91, 220) |
| HSL | hsl(221, 75%, 49%) |
| OKLCH | oklch(51.7% 0.207 262.7) |
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 #1F5BDC | 5.85:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #1F5BDC | 3.58:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #1F5BDC text on white | 5.85:1 | AA | Lc 78.5 | Fine for body text |
| #1F5BDC text on black | 3.58:1 | AA large text | Lc -23.3 | 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
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6C9EFF
oklch(70.7% 0.152 262.5)
-
Step 500
500
#4481FF
oklch(63% 0.198 262.7)
-
Step 600
600
#2365F2
oklch(55.5% 0.222 262.6)
-
Step 700
700 (this color)
#1F5BDC
oklch(51.7% 0.207 262.7)
-
Step 800
800
#1545AB
oklch(42.8% 0.171 262.6)
-
Step 900
900
#183B87
oklch(37.6% 0.134 263)
-
Step 950
950
#0F244F
oklch(27.1% 0.084 262.6)
#1F5BDC 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) | #006EE0 | 0.045 |
| Deuteranopia (no green cones) | #005CDA | 0.011 |
| Tritanopia (no blue cones) | #007C93 | 0.158 |
| Achromatopsia (no color) | #656565 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F5BDC
#1F5BDC
oklch(51.7% 0.207 262.7)
- #866100
#866100
oklch(51.7% 0.106 82.4)
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 #1F5BDC, closest first.
No curated palette has a color within ΔE 0.04 of #1F5BDC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.025
- Warm Blue #4B57DB ΔE 0.040
- Neon Blue #4361EE ΔE 0.046
- Royal Blue #4169E1 ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.051
- Bright Blue #0165FC ΔE 0.053
- Electric Blue #0652FF ΔE 0.057
- Blue Blue #2242C7 ΔE 0.066
Use #1F5BDC 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.