#258EC2
Closest named color: Blue NCS (#118AB2). oklch(61.3% 0.12 236), rgb(37, 142, 194).
Aa
Black text reads best on this color (5.72:1).
About this color
#258EC2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.028 away. Black text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.72:1 |
| White text | 3.66:1 |
Values
| HEX | #258EC2 |
| RGB | rgb(37, 142, 194) |
| HSL | hsl(200, 68%, 45%) |
| OKLCH | oklch(61.3% 0.12 236) |
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 #258EC2 | 3.66:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #258EC2 | 5.72:1 | AA | Lc 40.2 | Non-text elements, placeholder text |
| #258EC2 text on white | 3.66:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #258EC2 text on black | 5.72:1 | AA | Lc -37.8 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDEC
oklch(88.5% 0.032 236.4)
-
Step 300
300
#9DC7E2
oklch(80.9% 0.059 236.7)
-
Step 400
400
#63AAD3
oklch(70.7% 0.093 235.5)
-
Step 500
500 (this color)
#258EC2
oklch(61.3% 0.12 236)
-
Step 600
600
#007CAF
oklch(55.5% 0.12 236.1)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#064765
oklch(37.7% 0.078 236)
-
Step 950
950
#092A3B
oklch(27.1% 0.049 235.4)
#258EC2 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) | #758DC4 | 0.071 |
| Deuteranopia (no green cones) | #607FC1 | 0.058 |
| Tritanopia (no blue cones) | #009BA0 | 0.074 |
| Achromatopsia (no color) | #858585 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258EC2
#258EC2
oklch(61.3% 0.12 236)
- #BA6F34
#BA6F34
oklch(61.3% 0.12 56)
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 #258EC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.028
- Water Blue #0E87CC ΔE 0.030
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.037
- Off Blue #5684AE ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.047
- Faded Blue #658CBB ΔE 0.051
- Teal Blue #01889F ΔE 0.057
Use #258EC2 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.