#365CD1
Closest named color: Warm Blue (#4B57DB). oklch(51.7% 0.186 266.3), rgb(54, 92, 209).
Aa
White text reads best on this color (5.81:1).
About this color
#365CD1 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.186 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.029 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.60:1 |
| White text | 5.81:1 |
Values
| HEX | #365CD1 |
| RGB | rgb(54, 92, 209) |
| HSL | hsl(225, 63%, 52%) |
| OKLCH | oklch(51.7% 0.186 266.3) |
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 #365CD1 | 5.81:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #365CD1 | 3.60:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #365CD1 text on white | 5.81:1 | AA | Lc 78.6 | Fine for body text |
| #365CD1 text on black | 3.60:1 | AA large text | Lc -23.2 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FC
oklch(81% 0.09 266.3)
-
Step 400
400
#779CFA
oklch(70.7% 0.144 266.5)
-
Step 500
500
#5580F7
oklch(63% 0.184 266.3)
-
Step 600
600
#3C66E6
oklch(55.6% 0.2 266.2)
-
Step 700
700 (this color)
#365CD1
oklch(51.7% 0.186 266.3)
-
Step 800
800
#2745A2
oklch(42.6% 0.155 266.3)
-
Step 900
900
#243C80
oklch(37.8% 0.119 266.2)
-
Step 950
950
#15234B
oklch(26.9% 0.076 266.7)
#365CD1 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) | #006DD5 | 0.045 |
| Deuteranopia (no green cones) | #005ECF | 0.028 |
| Tritanopia (no blue cones) | #00798D | 0.148 |
| Achromatopsia (no color) | #656565 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #365CD1
#365CD1
oklch(51.7% 0.186 266.3)
- #836300
#836300
oklch(51.8% 0.106 86.4)
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 #365CD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.029
- Royal Blue #4169E1 ΔE 0.043
- Azul #1D5DEC ΔE 0.044
- Neon Blue #4361EE ΔE 0.049
- Iris #6258C4 ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.062
- Mid Blue #276AB3 ΔE 0.063
Use #365CD1 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.