#438FC4
Closest named color: Cool Blue (#4984B8). oklch(62.5% 0.11 241.9), rgb(67, 143, 196).
Aa
Black text reads best on this color (5.96:1).
About this color
#438FC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.110 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.032 away. Black text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.96:1 |
| White text | 3.52:1 |
Values
| HEX | #438FC4 |
| RGB | rgb(67, 143, 196) |
| HSL | hsl(205, 52%, 52%) |
| OKLCH | oklch(62.5% 0.11 241.9) |
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 #438FC4 | 3.52:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #438FC4 | 5.96:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #438FC4 text on white | 3.52:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #438FC4 text on black | 5.96:1 | AA | Lc -39.2 | 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
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C6E1
oklch(81% 0.054 241.5)
-
Step 400
400
#6FA7D2
oklch(70.6% 0.086 242.5)
-
Step 500
500 (this color)
#438FC4
oklch(62.5% 0.11 241.9)
-
Step 600
600
#1F7AB3
oklch(55.6% 0.12 242.2)
-
Step 700
700
#0F679A
oklch(49.2% 0.111 241.8)
-
Step 800
800
#12547D
oklch(42.8% 0.092 242)
-
Step 900
900
#184664
oklch(37.8% 0.071 241.1)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#438FC4 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) | #7790C6 | 0.055 |
| Deuteranopia (no green cones) | #6583C3 | 0.043 |
| Tritanopia (no blue cones) | #009CA1 | 0.080 |
| Achromatopsia (no color) | #898989 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #438FC4
#438FC4
oklch(62.5% 0.11 241.9)
- #B7773B
#B7773B
oklch(62.5% 0.11 61.5)
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 #438FC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.032
- Faded Blue #658CBB ΔE 0.033
- Steel Blue #4682B4 ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.040
- Off Blue #5684AE ΔE 0.040
- Water Blue #0E87CC ΔE 0.041
- Blue NCS #118AB2 ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.050
Use #438FC4 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.