#258CE7
Closest named color: Dark Sky Blue (#448EE4). oklch(62.9% 0.164 250.4), rgb(37, 140, 231).
Aa
Black text reads best on this color (5.98:1).
About this color
#258CE7 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.164 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.021 away. Black text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #258CE7 |
| RGB | rgb(37, 140, 231) |
| HSL | hsl(208, 80%, 53%) |
| OKLCH | oklch(62.9% 0.164 250.4) |
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 #258CE7 | 3.50:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #258CE7 | 5.98:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #258CE7 text on white | 3.50:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #258CE7 text on black | 5.98:1 | AA | Lc -39.5 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9AC5F3
oklch(80.9% 0.08 250.5)
-
Step 400
400
#5EA5ED
oklch(70.6% 0.128 250.4)
-
Step 500
500 (this color)
#258CE7
oklch(62.9% 0.164 250.4)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#024377
oklch(37.7% 0.106 250.2)
-
Step 950
950
#072846
oklch(27.2% 0.067 250.1)
#258CE7 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) | #5F92EB | 0.049 |
| Deuteranopia (no green cones) | #3F81E5 | 0.030 |
| Tritanopia (no blue cones) | #00A2AE | 0.120 |
| Achromatopsia (no color) | #898989 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258CE7
#258CE7
oklch(62.9% 0.164 250.4)
- #BC7800
#BC7800
oklch(63% 0.136 70.4)
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 #258CE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.021
- Dodger Blue #1E90FF ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.037
- Water Blue #0E87CC ΔE 0.043
- Soft Blue #6488EA ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.058
- Clear Blue #247AFD ΔE 0.061
- Cool Blue #4984B8 ΔE 0.071
Use #258CE7 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.