#258FBD
Closest named color: Blue NCS (#118AB2). oklch(61.3% 0.115 232.5), rgb(37, 143, 189).
Aa
Black text reads best on this color (5.74:1).
About this color
#258FBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.115 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.023 away. Black text reads best on it, at 5.74:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.74:1 |
| White text | 3.65:1 |
Values
| HEX | #258FBD |
| RGB | rgb(37, 143, 189) |
| HSL | hsl(198, 67%, 44%) |
| OKLCH | oklch(61.3% 0.115 232.5) |
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 #258FBD | 3.65:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #258FBD | 5.74:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #258FBD text on white | 3.65:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #258FBD text on black | 5.74:1 | AA | Lc -37.9 | 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
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEB
oklch(88.5% 0.031 234.5)
-
Step 300
300
#9DC8DF
oklch(81% 0.056 231.7)
-
Step 400
400
#63AACF
oklch(70.6% 0.09 232.7)
-
Step 500
500 (this color)
#258FBD
oklch(61.3% 0.115 232.5)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#054862
oklch(37.8% 0.074 231.6)
-
Step 950
950
#092A3A
oklch(27% 0.048 233.8)
#258FBD 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) | #788EBF | 0.074 |
| Deuteranopia (no green cones) | #647FBC | 0.063 |
| Tritanopia (no blue cones) | #009B9F | 0.067 |
| Achromatopsia (no color) | #868686 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #258FBD
#258FBD
oklch(61.3% 0.115 232.5)
- #B96F3D
#B96F3D
oklch(61.3% 0.114 52.9)
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 #258FBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.035
- Water Blue #0E87CC ΔE 0.038
- Steel Blue #4682B4 ΔE 0.038
- Off Blue #5684AE ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.045
- Teal Blue #01889F ΔE 0.050
- Faded Blue #658CBB ΔE 0.050
Use #258FBD 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.