#258EAF
Closest named color: Blue NCS (#118AB2). oklch(60.4% 0.103 224.2), rgb(37, 142, 175).
Aa
Black text reads best on this color (5.56:1).
About this color
#258EAF is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.103 and its hue 224°. 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 5.56:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.56:1 |
| White text | 3.77:1 |
Values
| HEX | #258EAF |
| RGB | rgb(37, 142, 175) |
| HSL | hsl(194, 65%, 42%) |
| OKLCH | oklch(60.4% 0.103 224.2) |
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 #258EAF | 3.77:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #258EAF | 5.56:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #258EAF text on white | 3.77:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #258EAF text on black | 5.56:1 | 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
#9EC8D9
oklch(80.8% 0.05 224.6)
-
Step 400
400
#65ACC6
oklch(70.8% 0.081 223.7)
-
Step 500
500 (this color)
#258EAF
oklch(60.4% 0.103 224.2)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#08495C
oklch(37.8% 0.067 223.8)
-
Step 950
950
#0A2B36
oklch(27.1% 0.042 224)
#258EAF 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) | #7B8BB1 | 0.079 |
| Deuteranopia (no green cones) | #697EAF | 0.070 |
| Tritanopia (no blue cones) | #009899 | 0.053 |
| Achromatopsia (no color) | #838383 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258EAF
#258EAF
oklch(60.4% 0.103 224.2)
- #B46C4C
#B46C4C
oklch(60.3% 0.103 44.3)
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 #258EAF, 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 0.031
- Steel Blue #4682B4 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.041
- Off Blue #5684AE ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.043
- Teal Green #0A9396 ΔE 0.047
- Water Blue #0E87CC ΔE 0.054
Use #258EAF 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.