#258EB0
Closest named color: Blue NCS (#118AB2). oklch(60.4% 0.104 224.9), rgb(37, 142, 176).
Aa
Black text reads best on this color (5.57:1).
About this color
#258EB0 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.104 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.016 away. Black text reads best on it, at 5.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.57:1 |
| White text | 3.76:1 |
Values
| HEX | #258EB0 |
| RGB | rgb(37, 142, 176) |
| HSL | hsl(195, 65%, 42%) |
| OKLCH | oklch(60.4% 0.104 224.9) |
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 #258EB0 | 3.76:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #258EB0 | 5.57:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #258EB0 text on white | 3.76:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #258EB0 text on black | 5.57:1 | AA | Lc -36.8 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C6DEE7
oklch(88.6% 0.028 222.3)
-
Step 300
300
#9EC8DA
oklch(80.9% 0.051 225.9)
-
Step 400
400
#65ACC7
oklch(70.8% 0.081 224.6)
-
Step 500
500 (this color)
#258EB0
oklch(60.4% 0.104 224.9)
-
Step 600
600
#007FA1
oklch(55.5% 0.105 225)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#08495C
oklch(37.8% 0.067 223.8)
-
Step 950
950
#0A2B36
oklch(27.1% 0.042 224)
#258EB0 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) | #7B8BB2 | 0.079 |
| Deuteranopia (no green cones) | #697EB0 | 0.069 |
| Tritanopia (no blue cones) | #009899 | 0.054 |
| Achromatopsia (no color) | #838383 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258EB0
#258EB0
oklch(60.4% 0.104 224.9)
- #B56C4B
#B56C4B
oklch(60.5% 0.104 44.6)
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 #258EB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.016
- Teal Blue #01889F ΔE 0.033
- Cool Blue #4984B8 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Dusty Blue #5A86AD ΔE 0.043
- Teal Green #0A9396 ΔE 0.049
- Water Blue #0E87CC ΔE 0.053
Use #258EB0 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.