#438CB8
Closest named color: Cool Blue (#4984B8). oklch(61.2% 0.099 237.8), rgb(67, 140, 184).
Aa
Black text reads best on this color (5.68:1).
About this color
#438CB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.099 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.023 away. Black text reads best on it, at 5.68:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.68:1 |
| White text | 3.69:1 |
Values
| HEX | #438CB8 |
| RGB | rgb(67, 140, 184) |
| HSL | hsl(203, 47%, 49%) |
| OKLCH | oklch(61.2% 0.099 237.8) |
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 #438CB8 | 3.69:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #438CB8 | 5.68:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #438CB8 text on white | 3.69:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #438CB8 text on black | 5.68:1 | AA | Lc -37.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A4C6DD
oklch(80.9% 0.049 237.8)
-
Step 400
400
#72A8CB
oklch(70.7% 0.077 237.7)
-
Step 500
500 (this color)
#438CB8
oklch(61.2% 0.099 237.8)
-
Step 600
600
#267BAA
oklch(55.5% 0.107 237.9)
-
Step 700
700
#176892
oklch(49.2% 0.099 237.5)
-
Step 800
800
#175577
oklch(42.8% 0.083 237.8)
-
Step 900
900
#1B4660
oklch(37.7% 0.065 238.5)
-
Step 950
950
#112938
oklch(26.9% 0.041 238.3)
#438CB8 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) | #788BBA | 0.057 |
| Deuteranopia (no green cones) | #6880B7 | 0.047 |
| Tritanopia (no blue cones) | #00979B | 0.069 |
| Achromatopsia (no color) | #858585 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #438CB8
#438CB8
oklch(61.2% 0.099 237.8)
- #B07445
#B07445
oklch(61.2% 0.098 57.6)
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 #438CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.027
- Steel Blue #4682B4 ΔE 0.028
- Blue NCS #118AB2 ΔE 0.030
- Faded Blue #658CBB ΔE 0.034
- Water Blue #0E87CC ΔE 0.045
- Teal Blue #01889F ΔE 0.053
Use #438CB8 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.