#488BBD
Closest named color: Cool Blue (#4984B8). oklch(61.4% 0.102 243.1), rgb(72, 139, 189).
Aa
Black text reads best on this color (5.70:1).
About this color
#488BBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.102 and its hue 243°. 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 5.70:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.70:1 |
| White text | 3.68:1 |
Values
| HEX | #488BBD |
| RGB | rgb(72, 139, 189) |
| HSL | hsl(206, 47%, 51%) |
| OKLCH | oklch(61.4% 0.102 243.1) |
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 #488BBD | 3.68:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #488BBD | 5.70:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #488BBD text on white | 3.68:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #488BBD text on black | 5.70:1 | AA | Lc -37.5 | 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
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A6C5DF
oklch(80.9% 0.05 243.7)
-
Step 400
400
#74A7CF
oklch(70.8% 0.08 242.8)
-
Step 500
500 (this color)
#488BBD
oklch(61.4% 0.102 243.1)
-
Step 600
600
#2D7AAF
oklch(55.7% 0.111 242.8)
-
Step 700
700
#1F6696
oklch(49.1% 0.103 243.1)
-
Step 800
800
#1C537A
oklch(42.6% 0.086 243.6)
-
Step 900
900
#1E4562
oklch(37.6% 0.067 243.4)
-
Step 950
950
#122939
oklch(27% 0.042 241)
#488BBD 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) | #758CBF | 0.050 |
| Deuteranopia (no green cones) | #6580BC | 0.040 |
| Tritanopia (no blue cones) | #00979C | 0.078 |
| Achromatopsia (no color) | #858585 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #488BBD
#488BBD
oklch(61.4% 0.102 243.1)
- #B0763E
#B0763E
oklch(61.5% 0.103 62.9)
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 #488BBD, 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 0.027
- Off Blue #5684AE ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.028
- Faded Blue #658CBB ΔE 0.030
- Blue NCS #118AB2 ΔE 0.037
- Water Blue #0E87CC ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.058
Use #488BBD 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.