#258ED4
Closest named color: Water Blue (#0E87CC). oklch(62.3% 0.139 243.8), rgb(37, 142, 212).
Aa
Black text reads best on this color (5.89:1).
About this color
#258ED4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.139 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.024 away. Black text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.89:1 |
| White text | 3.56:1 |
Values
| HEX | #258ED4 |
| RGB | rgb(37, 142, 212) |
| HSL | hsl(204, 70%, 49%) |
| OKLCH | oklch(62.3% 0.139 243.8) |
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 #258ED4 | 3.56:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #258ED4 | 5.89:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #258ED4 text on white | 3.56:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #258ED4 text on black | 5.89:1 | AA | Lc -39.0 | 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 500.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDF1
oklch(88.6% 0.038 243.3)
-
Step 300
300
#9BC6EA
oklch(80.8% 0.069 244)
-
Step 400
400
#61A8E0
oklch(70.8% 0.109 244)
-
Step 500
500 (this color)
#258ED4
oklch(62.3% 0.139 243.8)
-
Step 600
600
#0079BC
oklch(55.5% 0.136 243.9)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#03456E
oklch(37.6% 0.091 244.3)
-
Step 950
950
#072940
oklch(27% 0.057 243.1)
#258ED4 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) | #6D90D7 | 0.061 |
| Deuteranopia (no green cones) | #5481D3 | 0.044 |
| Tritanopia (no blue cones) | #009FA7 | 0.096 |
| Achromatopsia (no color) | #888888 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258ED4
#258ED4
oklch(62.3% 0.139 243.8)
- #C07107
#C07107
oklch(62.2% 0.14 63.5)
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 #258ED4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.033
- Cool Blue #4984B8 ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.051
- Steel Blue #4682B4 ΔE 0.053
- Blue NCS #118AB2 ΔE 0.054
- Faded Blue #658CBB ΔE 0.059
- Windows Blue #3778BF ΔE 0.062
Use #258ED4 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.