#488BBF
Closest named color: Cool Blue (#4984B8). oklch(61.5% 0.105 244.1), rgb(72, 139, 191).
Aa
Black text reads best on this color (5.72:1).
About this color
#488BBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.105 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.020 away. Black text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.72:1 |
| White text | 3.67:1 |
Values
| HEX | #488BBF |
| RGB | rgb(72, 139, 191) |
| HSL | hsl(206, 48%, 52%) |
| OKLCH | oklch(61.5% 0.105 244.1) |
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 #488BBF | 3.67:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #488BBF | 5.72:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #488BBF text on white | 3.67:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #488BBF text on black | 5.72:1 | AA | Lc -37.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5E0
oklch(80.9% 0.052 243.9)
-
Step 400
400
#74A7D0
oklch(70.8% 0.081 243.5)
-
Step 500
500 (this color)
#488BBF
oklch(61.5% 0.105 244.1)
-
Step 600
600
#2D79B1
oklch(55.6% 0.114 244.5)
-
Step 700
700
#1E6698
oklch(49.2% 0.106 243.9)
-
Step 800
800
#1C537B
oklch(42.6% 0.087 244.2)
-
Step 900
900
#1E4563
oklch(37.7% 0.068 244.3)
-
Step 950
950
#12293A
oklch(27.1% 0.043 242.6)
#488BBF 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) | #748CC1 | 0.048 |
| Deuteranopia (no green cones) | #6480BE | 0.039 |
| Tritanopia (no blue cones) | #00989D | 0.081 |
| Achromatopsia (no color) | #858585 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #488BBF
#488BBF
oklch(61.5% 0.105 244.1)
- #B0763B
#B0763B
oklch(61.5% 0.105 64.1)
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 #488BBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.020
- Steel Blue #4682B4 ΔE 0.028
- Off Blue #5684AE ΔE 0.029
- Faded Blue #658CBB ΔE 0.030
- Dusty Blue #5A86AD ΔE 0.030
- Blue NCS #118AB2 ΔE 0.039
- Water Blue #0E87CC ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.055
Use #488BBF 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.