#2589DC
Closest named color: Water Blue (#0E87CC). oklch(61.6% 0.153 248.9), rgb(37, 137, 220).
Aa
Black text reads best on this color (5.69:1).
About this color
#2589DC is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.153 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.027 away. Black text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.69:1 |
| White text | 3.69:1 |
Values
| HEX | #2589DC |
| RGB | rgb(37, 137, 220) |
| HSL | hsl(207, 72%, 50%) |
| OKLCH | oklch(61.6% 0.153 248.9) |
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 #2589DC | 3.69:1 | AA large text | Lc -69.5 | Content text, not long reading |
| Black text on #2589DC | 5.69:1 | AA | Lc 40.1 | Non-text elements, placeholder text |
| #2589DC text on white | 3.69:1 | AA large text | Lc 64.0 | Content text, not long reading |
| #2589DC text on black | 5.69:1 | AA | Lc -37.7 | 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 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9BC5F0
oklch(80.9% 0.076 249.4)
-
Step 400
400
#61A6E8
oklch(70.7% 0.12 248.9)
-
Step 500
500 (this color)
#2589DC
oklch(61.6% 0.153 248.9)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#054474
oklch(37.8% 0.1 248.7)
-
Step 950
950
#082844
oklch(27% 0.064 249)
#2589DC 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) | #618EDF | 0.051 |
| Deuteranopia (no green cones) | #457EDA | 0.032 |
| Tritanopia (no blue cones) | #009DA8 | 0.111 |
| Achromatopsia (no color) | #858585 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2589DC
#2589DC
oklch(61.6% 0.153 248.9)
- #B87300
#B87300
oklch(61.5% 0.134 68.7)
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 #2589DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.028
- Chefchaouen Blue #4895EF ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.053
- Cool Blue #4984B8 ΔE 0.056
- Soft Blue #6488EA ΔE 0.056
- Windows Blue #3778BF ΔE 0.057
- Steel Blue #4682B4 ΔE 0.061
Use #2589DC 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.