#2561BC
Closest named color: Mid Blue (#276AB3). oklch(50.5% 0.156 258.9), rgb(37, 97, 188).
Aa
White text reads best on this color (5.97:1).
About this color
#2561BC is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.156 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #2561BC |
| RGB | rgb(37, 97, 188) |
| HSL | hsl(216, 67%, 44%) |
| OKLCH | oklch(50.5% 0.156 258.9) |
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 #2561BC | 5.97:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #2561BC | 3.51:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #2561BC text on white | 5.97:1 | AA | Lc 79.4 | Fine for body text |
| #2561BC text on black | 3.51:1 | AA large text | Lc -22.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
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
#A3C2F2
oklch(80.8% 0.076 259)
-
Step 400
400
#72A1EB
oklch(70.6% 0.12 259.2)
-
Step 500
500
#4C88E5
oklch(63.1% 0.154 258.9)
-
Step 600
600
#2E6FD3
oklch(55.5% 0.168 259.1)
-
Step 700
700 (this color)
#2561BC
oklch(50.5% 0.156 258.9)
-
Step 800
800
#1D4C94
oklch(42.7% 0.129 259)
-
Step 900
900
#1D4076
oklch(37.6% 0.101 258.9)
-
Step 950
950
#122645
oklch(27% 0.064 258.9)
#2561BC 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) | #2C6BBF | 0.029 |
| Deuteranopia (no green cones) | #005DBA | 0.021 |
| Tritanopia (no blue cones) | #007785 | 0.121 |
| Achromatopsia (no color) | #636363 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2561BC
#2561BC
oklch(50.5% 0.156 258.9)
- #855C00
#855C00
oklch(50.6% 0.105 78.5)
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 #2561BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- French Blue #436BAD ΔE 0.049
- Warm Blue #4B57DB ΔE 0.066
- Royal Blue #4169E1 ΔE 0.067
- Windows Blue #3778BF ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.069
- Flat Blue #3C73A8 ΔE 0.069
Use #2561BC 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.