#2584BF
Closest named color: Water Blue (#0E87CC). oklch(58.8% 0.124 241.6), rgb(37, 132, 191).
Aa
Black text reads best on this color (5.13:1).
About this color
#2584BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.124 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.13:1 |
| White text | 4.09:1 |
Values
| HEX | #2584BF |
| RGB | rgb(37, 132, 191) |
| HSL | hsl(203, 68%, 45%) |
| OKLCH | oklch(58.8% 0.124 241.6) |
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 #2584BF | 4.09:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #2584BF | 5.13:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #2584BF text on white | 4.09:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #2584BF text on black | 5.13:1 | AA | Lc -34.0 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E2
oklch(80.9% 0.056 241)
-
Step 400
400
#6CA8D3
oklch(70.7% 0.089 240.8)
-
Step 500
500
#4091C8
oklch(63.1% 0.114 241.6)
-
Step 600
600 (this color)
#2584BF
oklch(58.8% 0.124 241.6)
-
Step 700
700
#01679C
oklch(49.2% 0.116 241.6)
-
Step 800
800
#0B547E
oklch(42.7% 0.095 241.5)
-
Step 900
900
#154665
oklch(37.8% 0.074 240.9)
-
Step 950
950
#0E293B
oklch(27% 0.047 240.8)
#2584BF 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) | #6885C2 | 0.060 |
| Deuteranopia (no green cones) | #5377BE | 0.047 |
| Tritanopia (no blue cones) | #009399 | 0.084 |
| Achromatopsia (no color) | #7D7D7D | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2584BF
#2584BF
oklch(58.8% 0.124 241.6)
- #B0691E
#B0691E
oklch(58.8% 0.124 61.5)
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 #2584BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Steel Blue #4682B4 ΔE 0.026
- Cool Blue #4984B8 ΔE 0.026
- Blue NCS #118AB2 ΔE 0.031
- Windows Blue #3778BF ΔE 0.034
- Nice Blue #107AB0 ΔE 0.037
- Off Blue #5684AE ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.050
Use #2584BF 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.