#275DDB
Closest named color: Azul (#1D5DEC). oklch(52.2% 0.201 263.5), rgb(39, 93, 219).
Aa
White text reads best on this color (5.71:1).
About this color
#275DDB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.201 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.026 away. White text reads best on it, at 5.71:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #275DDB |
| RGB | rgb(39, 93, 219) |
| HSL | hsl(222, 71%, 51%) |
| OKLCH | oklch(52.2% 0.201 263.5) |
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 #275DDB | 5.71:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #275DDB | 3.67:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #275DDB text on white | 5.71:1 | AA | Lc 77.9 | Fine for body text |
| #275DDB text on black | 3.67:1 | AA large text | Lc -23.9 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4781FF
oklch(63.2% 0.197 263.3)
-
Step 600
600
#2B65EF
oklch(55.5% 0.217 263.6)
-
Step 700
700 (this color)
#275DDB
oklch(52.2% 0.201 263.5)
-
Step 800
800
#1A45A8
oklch(42.7% 0.166 263.3)
-
Step 900
900
#1B3C85
oklch(37.8% 0.129 263.3)
-
Step 950
950
#10244E
oklch(27.1% 0.082 263)
#275DDB 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) | #006FDF | 0.043 |
| Deuteranopia (no green cones) | #005ED9 | 0.016 |
| Tritanopia (no blue cones) | #007D93 | 0.156 |
| Achromatopsia (no color) | #666666 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #275DDB
#275DDB
oklch(52.2% 0.201 263.5)
- #876300
#876300
oklch(52.3% 0.107 83.6)
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 #275DDB, closest first.
No curated palette has a color within ΔE 0.04 of #275DDB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.026
- Warm Blue #4B57DB ΔE 0.035
- Royal Blue #4169E1 ΔE 0.041
- Neon Blue #4361EE ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.048
- Bright Blue #0165FC ΔE 0.053
- Electric Blue #0652FF ΔE 0.061
- Blue Blue #2242C7 ΔE 0.071
Use #275DDB 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.