#2580D7
Closest named color: Water Blue (#0E87CC). oklch(59.3% 0.156 251.7), rgb(37, 128, 215).
Aa
Black text reads best on this color (5.14:1).
About this color
#2580D7 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.156 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.029 away. Black text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.14:1 |
| White text | 4.07:1 |
Values
| HEX | #2580D7 |
| RGB | rgb(37, 128, 215) |
| HSL | hsl(209, 71%, 49%) |
| OKLCH | oklch(59.3% 0.156 251.7) |
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 #2580D7 | 4.07:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #2580D7 | 5.14:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #2580D7 text on white | 4.07:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #2580D7 text on black | 5.14:1 | AA | Lc -34.2 | Non-text elements, placeholder text |
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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DBF3
oklch(88.4% 0.04 253)
-
Step 300
300
#A0C4ED
oklch(80.8% 0.07 252)
-
Step 400
400
#6AA5E5
oklch(70.8% 0.113 251.5)
-
Step 500
500
#3E8CDD
oklch(63% 0.144 251.9)
-
Step 600
600 (this color)
#2580D7
oklch(59.3% 0.156 251.7)
-
Step 700
700
#0161AF
oklch(49% 0.145 251.9)
-
Step 800
800
#0A508E
oklch(42.7% 0.12 251.7)
-
Step 900
900
#144371
oklch(37.7% 0.093 251.4)
-
Step 950
950
#0E2742
oklch(26.9% 0.059 252.4)
#2580D7 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) | #5586DA | 0.043 |
| Deuteranopia (no green cones) | #3776D5 | 0.027 |
| Tritanopia (no blue cones) | #0095A1 | 0.116 |
| Achromatopsia (no color) | #7E7E7E | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2580D7
#2580D7
oklch(59.3% 0.156 251.7)
- #AC6F00
#AC6F00
oklch(59.2% 0.127 71.6)
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 #2580D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.029
- Windows Blue #3778BF ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.049
- Cool Blue #4984B8 ΔE 0.056
- Steel Blue #4682B4 ΔE 0.059
- Clear Blue #247AFD ΔE 0.062
- Nice Blue #107AB0 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.063
Use #2580D7 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.