#276ACF
Closest named color: Royal Blue (#4169E1). oklch(53.9% 0.17 258.9), rgb(39, 106, 207).
Aa
White text reads best on this color (5.18:1).
About this color
#276ACF is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.170 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #276ACF |
| RGB | rgb(39, 106, 207) |
| HSL | hsl(216, 68%, 48%) |
| OKLCH | oklch(53.9% 0.17 258.9) |
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 #276ACF | 5.18:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #276ACF | 4.04:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #276ACF text on white | 5.18:1 | AA | Lc 75.2 | Fine for body text |
| #276ACF text on black | 4.04:1 | AA large text | Lc -26.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A3C2F3
oklch(80.9% 0.077 259.4)
-
Step 400
400
#71A1EC
oklch(70.6% 0.122 259)
-
Step 500
500
#4B88E7
oklch(63.2% 0.157 259)
-
Step 600
600 (this color)
#276ACF
oklch(53.9% 0.17 258.9)
-
Step 700
700
#1F5CB8
oklch(49% 0.158 259)
-
Step 800
800
#1C4C95
oklch(42.7% 0.131 258.9)
-
Step 900
900
#1D4077
oklch(37.7% 0.102 259.2)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#276ACF 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) | #2E75D3 | 0.031 |
| Deuteranopia (no green cones) | #0066CD | 0.020 |
| Tritanopia (no blue cones) | #008292 | 0.131 |
| Achromatopsia (no color) | #6D6D6D | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #276ACF
#276ACF
oklch(53.9% 0.17 258.9)
- #916500
#916500
oklch(53.9% 0.112 78.8)
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 #276ACF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Mid Blue #276AB3 ΔE 0.044
- Cerulean Blue #056EEE ΔE 0.048
- Windows Blue #3778BF ΔE 0.051
- Warm Blue #4B57DB ΔE 0.056
- Azul #1D5DEC ΔE 0.057
- French Blue #436BAD ΔE 0.057
- Neon Blue #4361EE ΔE 0.058
Use #276ACF 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.