#2584AF
Closest named color: Blue NCS (#118AB2). oklch(57.9% 0.107 233.1), rgb(37, 132, 175).
Aa
Black text reads best on this color (4.99:1).
About this color
#2584AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.107 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.017 away. Black text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #2584AF |
| RGB | rgb(37, 132, 175) |
| HSL | hsl(199, 65%, 42%) |
| OKLCH | oklch(57.9% 0.107 233.1) |
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 #2584AF | 4.20:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #2584AF | 4.99:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #2584AF text on white | 4.20:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #2584AF text on black | 4.99:1 | AA | Lc -33.1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A3C7DB
oklch(81% 0.048 232.5)
-
Step 400
400
#6EA9C9
oklch(70.6% 0.077 233.1)
-
Step 500
500
#4393BB
oklch(63% 0.098 233.1)
-
Step 600
600 (this color)
#2584AF
oklch(57.9% 0.107 233.1)
-
Step 700
700
#076990
oklch(49.1% 0.1 233.5)
-
Step 800
800
#0F5675
oklch(42.8% 0.083 233.4)
-
Step 900
900
#17475E
oklch(37.7% 0.064 233.1)
-
Step 950
950
#0F2A37
oklch(27.1% 0.041 231.9)
#2584AF 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) | #6F83B1 | 0.069 |
| Deuteranopia (no green cones) | #5C76AE | 0.057 |
| Tritanopia (no blue cones) | #008F93 | 0.063 |
| Achromatopsia (no color) | #7C7C7C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2584AF
#2584AF
oklch(57.9% 0.107 233.1)
- #AB6738
#AB6738
oklch(58% 0.107 53.5)
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 #2584AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.017
- Steel Blue #4682B4 ΔE 0.026
- Cool Blue #4984B8 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.033
- Teal Blue #01889F ΔE 0.033
- Cerulean #457B9D ΔE 0.036
- Off Blue #5684AE ΔE 0.039
- Stormy Blue #507B9C ΔE 0.042
Use #2584AF 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.