#165FDF
Closest named color: Azul (#1D5DEC). oklch(52.5% 0.207 261.1), rgb(22, 95, 223).
Aa
White text reads best on this color (5.62:1).
About this color
#165FDF is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.207 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.021 away. White text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #165FDF |
| RGB | rgb(22, 95, 223) |
| HSL | hsl(218, 82%, 48%) |
| OKLCH | oklch(52.5% 0.207 261.1) |
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 #165FDF | 5.62:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #165FDF | 3.73:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #165FDF text on white | 5.62:1 | AA | Lc 77.3 | Fine for body text |
| #165FDF text on black | 3.73:1 | AA large text | Lc -24.5 | 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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC1FD
oklch(80.8% 0.093 261.6)
-
Step 400
400
#6A9FFD
oklch(70.7% 0.149 261.1)
-
Step 500
500
#4183FB
oklch(63.1% 0.192 261.2)
-
Step 600
600 (this color)
#165FDF
oklch(52.5% 0.207 261.1)
-
Step 700
700
#1456CB
oklch(49% 0.193 261.2)
-
Step 800
800
#1448A4
oklch(42.8% 0.158 261)
-
Step 900
900
#173D82
oklch(37.6% 0.124 261.1)
-
Step 950
950
#0F244C
oklch(26.9% 0.079 261.8)
#165FDF 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) | #0071E3 | 0.044 |
| Deuteranopia (no green cones) | #005FDD | 0.007 |
| Tritanopia (no blue cones) | #008096 | 0.158 |
| Achromatopsia (no color) | #676767 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #165FDF
#165FDF
oklch(52.5% 0.207 261.1)
- #8A6200
#8A6200
oklch(52.4% 0.108 80.6)
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 #165FDF, closest first.
No curated palette has a color within ΔE 0.04 of #165FDF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.042
- Neon Blue #4361EE ΔE 0.043
- Royal Blue #4169E1 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.044
- Bright Blue #0165FC ΔE 0.046
- Electric Blue #0652FF ΔE 0.056
- Blue Blue #2242C7 ΔE 0.075
Use #165FDF 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.