#2770DB
Closest named color: Royal Blue (#4169E1). oklch(56.1% 0.179 258.6), rgb(39, 112, 219).
Aa
White text reads best on this color (4.74:1).
About this color
#2770DB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.179 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.027 away. White text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #2770DB |
| RGB | rgb(39, 112, 219) |
| HSL | hsl(216, 71%, 51%) |
| OKLCH | oklch(56.1% 0.179 258.6) |
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 #2770DB | 4.74:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #2770DB | 4.42:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #2770DB text on white | 4.74:1 | AA | Lc 72.4 | Content text, not long reading |
| #2770DB text on black | 4.42:1 | AA large text | Lc -29.3 | 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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400
#6EA1F0
oklch(70.7% 0.129 258.9)
-
Step 500
500
#4687EB
oklch(63% 0.165 258.8)
-
Step 600
600 (this color)
#2770DB
oklch(56.1% 0.179 258.6)
-
Step 700
700
#185CBD
oklch(49.2% 0.167 258.6)
-
Step 800
800
#174B99
oklch(42.6% 0.139 259)
-
Step 900
900
#1A4079
oklch(37.7% 0.106 258.6)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#2770DB 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) | #2F7CDF | 0.033 |
| Deuteranopia (no green cones) | #006BD9 | 0.021 |
| Tritanopia (no blue cones) | #008A9B | 0.137 |
| Achromatopsia (no color) | #737373 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2770DB
#2770DB
oklch(56.1% 0.179 258.6)
- #996B00
#996B00
oklch(56.1% 0.117 78.9)
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 #2770DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.027
- Cerulean Blue #056EEE ΔE 0.032
- Neon Blue #4361EE ΔE 0.050
- Windows Blue #3778BF ΔE 0.053
- Azul #1D5DEC ΔE 0.055
- Clear Blue #247AFD ΔE 0.055
- Bright Blue #0165FC ΔE 0.060
- Mid Blue #276AB3 ΔE 0.063
Use #2770DB 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.