#488CCB
Closest named color: Cool Blue (#4984B8). oklch(62.4% 0.118 248.6), rgb(72, 140, 203).
Aa
Black text reads best on this color (5.88:1).
About this color
#488CCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.118 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.033 away. Black text reads best on it, at 5.88:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.88:1 |
| White text | 3.56:1 |
Values
| HEX | #488CCB |
| RGB | rgb(72, 140, 203) |
| HSL | hsl(209, 56%, 54%) |
| OKLCH | oklch(62.4% 0.118 248.6) |
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 #488CCB | 3.56:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #488CCB | 5.88:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #488CCB text on white | 3.56:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #488CCB text on black | 5.88:1 | AA | Lc -38.7 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DBEE
oklch(88.4% 0.033 249.6)
-
Step 300
300
#A4C4E5
oklch(80.8% 0.058 249.3)
-
Step 400
400
#72A6D8
oklch(70.8% 0.092 248.3)
-
Step 500
500 (this color)
#488CCB
oklch(62.4% 0.118 248.6)
-
Step 600
600
#2977BA
oklch(55.5% 0.128 248.6)
-
Step 700
700
#1B64A1
oklch(49.1% 0.12 248.8)
-
Step 800
800
#195282
oklch(42.7% 0.099 248.2)
-
Step 900
900
#1C4468
oklch(37.7% 0.077 248.4)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#488CCB 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) | #708FCE | 0.044 |
| Deuteranopia (no green cones) | #5F82CA | 0.033 |
| Tritanopia (no blue cones) | #009BA2 | 0.092 |
| Achromatopsia (no color) | #888888 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #488CCB
#488CCB
oklch(62.4% 0.118 248.6)
- #B5782B
#B5782B
oklch(62.3% 0.118 68.2)
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 #488CCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.033
- Faded Blue #658CBB ΔE 0.036
- Water Blue #0E87CC ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.037
- Steel Blue #4682B4 ΔE 0.041
- Off Blue #5684AE ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.046
- Blue NCS #118AB2 ΔE 0.052
Use #488CCB 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.