#2561CE
Closest named color: Royal Blue (#4169E1). oklch(51.9% 0.18 261.2), rgb(37, 97, 206).
Aa
White text reads best on this color (5.70:1).
About this color
#2561CE is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.180 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.045 away. White text reads best on it, at 5.70:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.67:1 |
| White text | 5.70:1 |
Values
| HEX | #2561CE |
| RGB | rgb(37, 97, 206) |
| HSL | hsl(219, 70%, 48%) |
| OKLCH | oklch(51.9% 0.18 261.2) |
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 #2561CE | 5.70:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #2561CE | 3.67:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #2561CE text on white | 5.70:1 | AA | Lc 78.0 | Fine for body text |
| #2561CE text on black | 3.67:1 | AA large text | Lc -23.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A1C2FA
oklch(81% 0.087 260.8)
-
Step 400
400
#6E9FF7
oklch(70.6% 0.14 261.4)
-
Step 500
500
#4785F3
oklch(63.2% 0.177 260.9)
-
Step 600
600
#296BE2
oklch(55.6% 0.193 261.1)
-
Step 700
700 (this color)
#2561CE
oklch(51.9% 0.18 261.2)
-
Step 800
800
#1A499F
oklch(42.7% 0.149 261.2)
-
Step 900
900
#1B3E7E
oklch(37.7% 0.116 261.2)
-
Step 950
950
#10254A
oklch(27% 0.074 260.8)
#2561CE 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) | #076ED2 | 0.033 |
| Deuteranopia (no green cones) | #005FCC | 0.017 |
| Tritanopia (no blue cones) | #007C8E | 0.139 |
| Achromatopsia (no color) | #666666 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2561CE
#2561CE
oklch(51.9% 0.18 261.2)
- #886100
#886100
oklch(52% 0.107 81.1)
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 #2561CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.045
- Warm Blue #4B57DB ΔE 0.045
- Azul #1D5DEC ΔE 0.047
- Mid Blue #276AB3 ΔE 0.051
- Cerulean Blue #056EEE ΔE 0.056
- Neon Blue #4361EE ΔE 0.057
- French Blue #436BAD ΔE 0.067
- Iris #6258C4 ΔE 0.069
Use #2561CE 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.